input: Write a function to create a dictionary containing student names and their respective marks as key-value pairs. The function should return the dictionary.
  assert construct_student_marks()=={ 
      "John" : 90, 
      "Levi" : 85, 
      "Jill" : 95, 
      "Sara" : 75
  }
output: def construct_student_marks():
      return {
          "John": 90,
          "Levi": 85,
          "Jill": 95,
          "Sara": 75
      }