PLEASE HELP Calculate the simple interest on each amount and the total amount at the end.

a) a loan of $250 at 5% per year over three years

b) a deposit of $500 that pays 3.5% per year over five years

c) a loan of $1200 at 6.9% per year over four years

d) a deposit of $2550 that earns 3% interest over 30 months

e) a loan of $5000 at 8% per year over 39 weeks