input: Write a function that constructs a Python dictionary containing student names and their corresponding marks as key-value pairs. The function should take no input and return the dictionary as shown.
  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 }