Mitchell Investments has offered you the following investment opportunity: $7,000 at the end of each year for the first 7 years, plus $6,000 at the end of each year from years 8 through 14, plus $3,000 at the end of each year from years 15 through 25. Use Table II and Table IV or a financial calculator to answer the questions. Round your answers to the nearest dollar. a. How much would you be willing to pay for this investment if you required a 13 percent rate of return? $ b. If the payments were received at the beginning of each year, what would you be willing to pay for this investment? $