please assist with solving by hand or by calculator. thank you.

Walt is evaluating an investment that will provide the following returns at the end of each of the following years: year 1,$12,900; year 2,$10,400; year 3,$7,900; year 4,$5,400; year 5,$2,900; year 6,$0; and year 7,$12,900. Walt belicves that he should earn 12 percent compounded annually on this investment. Required: o. 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 monthly? Note: For all requirements, do not round PV factors and round your other intermediate calculations and final answer to the nearest whole dollar amount