please help!

Refer to Table $10-1,$ which is based on bonds paying $10$ percent interest for $20$ years. Assume interest rates in the market $($yield to

maturity$)$ decline from $7$ percent to $6$ percent.

a$.$ What is the bond price at $7$ percent?

Bond price

b$.$ What is the bond price at $6$ percent?

Bond price

c$.$ What would be your percentage return on investment if you bought when rates were $7$ percent and sold when rates were $6$

percent?

Note: Do not round intermediate calculations. Input your answer as a percent rounded to $2$ decimal places.