You purchase a car using a $20,000 loan with a 5% simple interest rate. 
(A) how much interest do u pay on your loan if you pay off the loan in 4 years ? Show your work 
(B) how much interest do u pay on your loan if you pay off the loan in 
2 years? Show your work 
(C) how much interest do u save by paying the loan off in 2 years instead of 4? Show your work 
Please help me out