I copied homework from my friend.when our mam had to check the homework, my friend was on leave and i had to get his homework checked. when checked our homework, she came to know that either of us had copied.when she asked me, i told her that i had done the homework myself and my friend had copied. she gave him the punishment of repeating the work 20 times. now i don't have the courage to tell him the truth. please help me.