parts A and B with all work shown please!! Thank you!

Solve the following: (a) A credit card company charges its customers 1 %A4% interest per month. Using the Factor Calculator, compute the effective annual interest rate that is being charged to the customers (b) John took out a loan of $X from his local credit union. He was required to pay off the loan at a nominal annual rate of 7.2%. The first payment is to start at the end of the third month (from when the loan was taken out) and he will make a total of 12 monthly payments of $120 each. Compute the amount of this loan, X