Boeing Corporation has just issued a callable $($at par$)$ three$-$year, $4\mathrm{.}7\%$ coupon bond with semi$-$annual coupon payments. The bond can be called at par in two years or anytime thereafter on a coupon payment date. It has a price of $$98\mathrm{.}89.$

a$.$ What is the bond's yield to maturity?

b$.$ What is its yield to call?

c$.$ What is its yield to worst?

a$.$ What is the bond's yield to maturity?

The bond's yield to maturity is

$\%.($Round to two decimal places.$)$