4-34: Jerry bought a house for $400,000 and made an $80,000 down payment. He obtained a 30-year load for the remaining amountt. Payments were made monthly. The nominal annual interest rate was 6%. After 10 years (120 payments) he sold the house and paid off the loan's remaining balance. (a) What was his monthly loan payment? (b) What must he have paid (in addition to his regular 120th monthly payment) to pay off the loan? Calculuate the answers to this problem using Microsoft Excel's built in economic functions.