You need a 20-year, fixed-rate mortgage to buy a new home for $240,000. Your mortgage bank will lend you the money at a 6.6 percent APR for this 240-month loan. However, you can afford monthly payments of only $850, so you offer to pay off any remaining loan balance at the end of the loan in the form of a single balloon payment. Required: How large will this balloon payment have to be for you to keep your monthly payments at $850? You're prepared to make monthly payments of $310, beginning at the end of this month, into an account that pays 11 percent interest compounded monthly Required: How many payments will you have made when your account balance reaches $23,593? (Do not round your intermediate calculations.)