JS-Q4

// given the following data object, write functions that returns:
// 1- All professors
// 2- All students
// 3- Name of students with gpa higher than 3.1
// 4- A function that takes the prof. id and return all of his courses by name

var data = {
  "users": [{
    "id": "001",  
    "name": "Prof. Alaa Ahmed",
    "role": "professor",
    "courses": ["cs101"]
  }, {
    "id": "002",  
    "name": "Prof. Bahaa Elromy",
    "role": "professor",
    "courses": ["cs301", "cs304"]
  }, {
    "id": "100",  
    "name": "Fahmy",
    "role": "student",
    "courses": ["cs301"],
    "gpa": 3.81
  }, {
    "id": "101",  
    "name": "Osama",
    "role": "student",
    "courses": ["cs401"],
    "gpa": 2.90
  }, {
    "id": "101",  
    "name": "Noha",
    "role": "student",
    "courses": ["cs301"],
    "gpa": 3.11
  }, {
    "id": "104",  
    "name": "Asmaa",
    "role": "student",
    "courses": ["cs301"],
    "gpa": 3.32
  }],
  "courses": [{
    "id": "cs101",
    "title": "intro to CS"
    },{
    "id": "cs301",
    "title": "intro to Databases"
    },{
    "id": "cs304",
    "title": "Networking"
    }]
};