two part question please show your work

1. A 850 000.00, 6% bond with semi-annual coupons redeemable at par in 14 years is purchased to reld 8% compounded semi-annually. What is the gain or loss if the bond is sold four years before maturity at 99.25? . A $50 000.00, 8% bond with quarterly coupons redeemable at par is purchased five years before maturity to yield 4% compounded semi-annually. Determine the premium or discount