John and Jane have been saving to pay for their daughter Macy's college education. Macy just turned 10 at (t = 0), and she will be entering college 8 years from now (at t = 8). College tuition and expenses are currently $20,000 a year, but they are expected to increase at a rate of 6% a year. Tuition and other costs will be due at the end of years 8, 9, 10, and 11. To fund the tuition, John and Jane plan to save $15,000 in their college savings account today (at t = 0). Additionally, they plan to save $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 10%. How large must the annual payments at t = 5, 6, and 7 be to cover Macy's anticipated college costs?