Please do both!!!

What is the initial value of a $6-$year semi$-$annual bond with coupon rate $4\%$ nominal yearly, yield rate $5\%$ nominal yearly, and face value $$1000?$

Suppose that a $$1000$ bond with quarterly coupons, maturity $2$ years, and yield rate $5\%$ nominal yearly is purchased for $$950.$ What must be the bond's nominal yearly coupon rate?