167. You are in negotiations to make a 7-year loan of $25,000 to DeVille Corporation. To repay you,
DeVille will pay $2,500 at the end of Year 1, $5,000 at the end of Year 2, and $7,500 at the end of
Year 3, plus a fixed but currently unspecified cash flow, X, at the end of each year from Year 4
through Year 7. You are confident the payments will be made, since DeVille is essentially riskless.
You regard 8% as an appropriate rate of return on a low risk but illiquid 7-year loan. What cash flow
must the investment provide at the end of each of the final 4 years, that is, what is X?
168. Scott and Linda have been saving to pay for their daughter Casie’s college education. Casie just turned
10 at (t = 0), and she will be entering college 8 years from now (at t = 8). College tuition and expenses
at State U. are currently $14,500 a year, but they are expected to increase at a rate of 3.5% a year.
Ellen should graduate in 4 years⎯if she takes longer or wants to go to graduate school, she will be on
her own. Tuition and other costs will be due at the beginning of each school year (at t = 8, 9, 10, and
11).
So far, Scott and Linda have accumulated $15,000 in their college savings account (at t = 0). Their
long-run financial plan is to add an additional $5,000 in each of the next 4 years (at t = 1, 2, 3, and 4).
Then they plan to make 3 equal annual contributions in each of the following years, t = 5, 6, and 7.
They expect their investment account to earn 9%. How large must the annual payments at t = 5, 6, and
7 be to cover Casie’s anticipated college costs?