formula and how to do it pls

What is the current annual yield of a 30 year $1,000 par 5% semiannual pay coupon bond I bought for $800. What number is closest to your result? a. 5.0 b. 5.6% c. 6.0% d. 6.3% What is the current annual yield of a 30 year $1,000 par 5% semiannual pay coupon bond I bought for $1,200. What number is closest to your result? a. 4.2% b. 4.5% c. 4.7% d. 5.0% What is the current annual yield of a 30 year $1,000 par 5% semiannual pay coupoil bond I bought for $1,200. What number is closest to your result? a. 4.2% b. 4.5% c. 4.7% d. 5.0%