input: Write a function to construct a dictionary containing student names and marks as key-value pairs. Return the dictionary.
  def construct_student_marks_dict():
      student_marks = { 
          "John" : 90, 
          "Levi" : 85, 
          "Jill" : 95, 
          "Sara" : 75
      }
      return student_marks
  assert construct_student_marks_dict() == {"John" : 90, "Levi" : 85, "Jill" : 95, "Sara" : 75}
output: def construct_student_marks_dict():
      student_marks = { 
          "John" : 90, 
          "Levi" : 85, 
          "Jill" : 95, 
          "Sara" : 75
      }
      return student_marks