Write a class Student) such that it has an attribute 'score (that is initialized with 10] and three methods 1. add_score(): adds 10 to the score 2. decrease_score(): decreases score by 10 3. str): returns the current score [should return a string) Example: p Studentl) printlp) 10 p.add_scorel) printlp) 20 p.decrease scorel) printlp) 10