Walt is evaluating an investment that will provide the following returns at the end of each of the following years: year 1,$12,500; year 2,$10,000; year 3,$7,500; year 4,$5,000; year 5,$2,500; year 6,$0; and year 7,$12,500. Walt believes that he should earn 12 . percent compounded annually on this investment. Required: a. How much should he pay for this investment? b. How much should he pay if he expects to earn an annual return of 9 percent compounded monthil? Note: For all requirements, do not round intermediate calculations and round your final answers to the nearest whole dollar amount