7 5. Construct an amortization schedule for the mortgage. If the Halls would pay extra payment of $150 a month starting 73th month, how quickly will they able to payoff the mortgage? Be sure to have a zero balance at the end of amortization. 9 Month 10 11 12 13 14 Loan Amount Interest (APR) Prepay Loan Length in months Total interest payment Total # of pmts with prepay Beginning Principal Monthly Payment Interest Principal pmt Outstanding Balance 1 Hint Be sure to compute the total interest payments using "Sum()" function With the prepayments, note that your payments will be shortened