need calculation process

A bond with exactly five years until maturity paying 3% p.a. coupons semi-annually and with a face value of $100 was purchased at a yield of 2.5% p.a. The bond was sold exactly four years later for a yield of 3% p.a. All coupons were reinvested at 3.5% p.a. Calculate the realised yield-to-maturity on this bond