if you could elaborate more on the steps involved, please! thank you

1 A 10% bond with face amount 100 is callable on any coupon date! from 15/2 years after issue up to the maturity date which is 20 years from issue. (a) Find the price of the bond to yield a minimum nominal annual rate of (i) 12%, (ii) 10%, and (iii) 8%. (b) Find the minimum annual yield to maturity if the bond is pur- chased for (i) 80, (ii) 100, and (iii) 120