If the current yield for AAA rated corporate bonds is 6%, the current yield for AAA rated municipal bonds is 5.2%, the current yield for AA rated corporate bonds is 5.5%, the current yield for AA rated municipals is 4%, the current 10-year Treasury Bond yield is 3.7%, and the current US T-Bill rate is 1.3%, then what is the risk premium for AA rated corporate bonds?

If the coupons on a bond are $15 every six-months, and the YTM is 4%, then what is the coupon rate?