plz answer Q1 a&b

Clyde Sdale is considering the purchase of the following Builtrite bond: $1000 par, 71/4% coupon rate, 15 year maturity that is currently selling for $940. If Clyde purchases this bond, what would his approximate yield to maturity be? 6.22% 686% 7.24% 707% Beginning in 5 years, (beginning of years 5,6 and 7) Sally Mander will receive three annual benefit checks of $25,000 each. If Sally assumes an interest rate of 6%, what is the present value of these checks? $67,320 $62,925 $56,100 $50,300