please WRITE OUT steps and do not use excel screenshots. thanks

4.2.4 The amortization schedule for a 100, 5% bond with yielding a nominal annual rate of i(2) = 6.6% gives a value of 90.00 for the bond at the beginning of a certain 6-month period just after a coupon has been paid. What is the book value at the start of the next 6-month period? 4.2.5 A bond of face amount 100 is purchased at a premium of 36 to yield 7%. The amount for amortization of premium in the 5th coupon is 1.00. What is the term of the bond