You have been approved for a $50,000 at 6% compounded semi-annually and you plan to make monthly payments of $1,000 to pay off the loan. a) How many payments are needed to pay off the loan? b) What will be the size of your last payment? (Must use the buttons p/y, c/y, n, i/y, pv, pmt, and fv on the calculator and show which is being computed for)