Bond A has a coupon rate of 15.20 percent, a yield to maturity of 8.60 percent and a face value of 1000. matures in 10 years and pays coupons annually with the next coupon expected in one year. What is ( x+y+z) if x is the present value of any coupon payments expected to be made in four years from today, Y is the present value of any coupon payment sexpected to be made in eight years from today, and Z is the present value of any coupon payments expected to be made in twelve years from today?