// MongoDB Query Exercises// Use the sample collection below and write MongoDB queries for each task.// Optional reset:db.students.drop();// Sample datadb.students.insertMany([ { name: "Alice", age: 18, grade: 1, hobbies: ["reading", "sports"], scores: [80, 90, 85] }, { name: "Bob", age: 20, grade: 2, hobbies: ["gaming"], scores: [60, 70, 65] }, { name: "Charlie", age: 19, grade: 1, hobbies: ["reading", "music"], scores: [95, 85, 92] }, { name: "Diana", age: 21, grade: 3, hobbies: ["sports", "music"], scores: [50, 60, 55] }, { name: "Eve", age: 18, grade: 2, hobbies: ["gaming", "reading"], scores: [88, 91, 84] }, { name: "Frank", age: 22, grade: 3, hobbies: ["reading", "music", "gaming"], scores: [72, 81, 90] }, { name: "Grace", age: 17, grade: 1, hobbies: ["music"], scores: [99, 97, 100] }, { name: "Henry", age: 20, grade: 2, hobbies: ["sports", "coding"], scores: [68, 74, 79] }, { name: "Isabel", age: 19, grade: 2, hobbies: ["reading", "coding"], scores: [82, 86, 88] }, { name: "Jack", age: 21, grade: 1, hobbies: ["sports", "music", "reading"], scores: [55, 89, 93] }]);// ======================================================// TASKS// Write a MongoDB query for each task.// Example format:// db.students.find({ age: 18 })// ======================================================// 1. Find students with age equal to 18.// 2. Find students older than 19.// 3. Find students with age greater than or equal to 20.// 4. Find students with age less than 19.// 5. Find students with age less than or equal to 18.// 6. Find students whose grade is not 2.// 7. Find students whose grade is either 1 or 3.// 8. Find students whose grade is not in [1, 2].// 9. Find students aged between 18 and 20 (inclusive).// 10. Find students who are either 18 years old OR in grade 3.// 11. Find students who are NOT older than 20.// 12. Find students who are neither in grade 1 nor grade 2.// 13. Find students whose hobbies include both "reading" AND "sports".// 14. Find students with exactly 1 hobby.// 15. Find students with exactly 2 hobbies.// 16. Find students where at least one score is greater than 90.// 17. Find students with at least one score between 85 and 95.// 18. Find students who are (age >= 18 AND age <= 20) AND grade = 1.// 19. Find students who are either in grade 1 OR have a score above 90.// 20. Find students who do NOT have any score below 60.// 21. Find students with hobbies including "reading" but NOT "gaming".// 22. Find students with exactly 3 scores and at least one score above 90.// 23. Find students whose scores contain ALL of [85, 90].// 24. Find students where:// - age is between 18 and 21// - AND (grade is 1 OR grade is 2)// - AND hobbies include "reading"// 25. Find students where:// - NOT (grade is 3)// - AND at least one score is less than 60// 26. Find students where:// - hobbies include "music"// - AND scores have an element >= 90 AND <= 100// 27. Find students where:// - age != 18// - AND hobbies size is 2// - AND scores do NOT contain values < 70// 28. Find students where:// - (age < 19 OR age > 20)// - AND hobbies include BOTH "reading" and "music"// 29. Find students where:// - all scores are between 80 and 100// - AND grade is not in [2, 3]// 30. Find students where:// - hobbies contain all of ["sports", "music"]// - AND age is not 21// - AND grade is 1 or 3// -------------------------// HARDER TASKS// -------------------------// 31. Find students where:// - age is between 18 and 22// - AND hobbies contain "reading"// - AND hobbies do NOT contain "gaming"// - AND at least one score is > 90// 32. Find students where:// - grade is 1// - AND (age < 18 OR age > 20)// - AND scores contain all of [89, 93]// 33. Find students where:// - hobbies array has exactly 3 elements// - AND includes "music"// - AND does NOT include "gaming"// - AND at least one score is between 80 and 95// 34. Find students where:// - NOT(age <= 18)// - AND NOT(grade = 2)// - AND hobbies include either "coding" OR "sports"// 35. Find students where:// - scores have at least one value < 60// - OR hobbies contain all of ["reading", "music"]// 36. Find students where:// - age is not in [17, 18]// - AND hobbies size is at least conceptually "not 1" (use available operators only)// - AND grade <= 2// 37. Find students where:// - all scores are >= 70// - AND at least one score is >= 90// - AND hobbies include "reading"// 38. Find students where:// - neither grade 2 nor grade 3// - AND age >= 18// - AND hobbies include "sports"// 39. Find students where:// - age < 18 OR age > 21 OR grade = 3// - AND scores contain a value <= 55// 40. Find students where:// - hobbies include all of ["reading", "music"]// - AND scores do NOT contain any value < 80// - AND age is not equal to 19// 41. Find students where:// - grade is 1 or 2// - AND hobbies include "coding" or "music"// - AND age is between 19 and 21// 42. Find students where:// - NOT(age < 20)// - AND NOT(hobbies contain "sports")// - AND scores contain at least one value > 85// 43. Find students where:// - hobbies size is 2// - AND scores contain all of [82, 86]// - AND grade != 3// 44. Find students where:// - all scores are <= 90// - AND at least one score is >= 80// - AND age is in [19, 20, 21]// 45. Find students where:// - (grade = 1 AND hobbies contain "reading")// OR// (grade = 3 AND scores contain a value < 60)// 46. Find students where:// - hobbies contain "reading"// - AND hobbies contain "music"// - AND hobbies contain "sports"// - AND scores contain at least one value > 90// 47. Find students where:// - NOT(scores contain a value > 95)// - AND grade is not 2// - AND age >= 18// 48. Find students where:// - scores contain at least one value between 70 and 80// - AND at least one value between 90 and 100// - AND hobbies include "reading"// 49. Find students where:// - age <= 20// - AND not grade 1// - AND hobbies contain either "coding" or "gaming"// - AND scores do NOT contain values <= 60// 50. Find students where:// - neither (age < 18) nor (grade = 3)// - AND hobbies contain all of ["reading"]// - AND scores array has exactly 3 elements