Please show formulas

P620 Yield to maturity The relationship between a bonds yield to maturity and coupon interest rate can be used to predict its pricing level. For each of the bonds listed, state whether the price of the bond will be at a premium to par, at par, or at a discount to par.

Bond	Coupon interest rate	Yield to maturity	Price
A	6%	10%
B	8	8
C	9	7
D	7	9
E	12	10

Problem P6-20
Bond	Coupon Interest Rate	Yield to Maturity	Price
A	6%	10%
B	8%	8%
C	9%	7%
D	7%	9%
E	12%	10%