input: Write a function to create a python dictionary containing student names and 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}