Engineering Economics Question. Thanks

Problem #7 A bank is offering the following college savings plan. End-of-year deposits of $250 per year will be made to the plan for 10 years, with a single payment of $7500 returned to the investor at the time the last deposit is made. The college student will borrow $5000 per year for 4 years, beginning four years from the present. This loan of $20,000 will be repaid in 10 equal annual payments of $4500, beginning 1 year after college is completed (college lasts 4 years). What is the rate of interest paid on this financing arrangement under annual compounding