a $7\mathrm{.}9\%$

b $11\%$

c $7\mathrm{.}35\%$

d $10\mathrm{.}8\%$

sabans corporations $20$ year bond with a coupon rate of $10\%.$ interest paid semiannually. matures in eight years and are proces $$1120.$ what isnthe annuel yield