the end of three years and six interest payments, what should the selling price be

to yield a $10\%$ return on the investment?

$4\mathrm{.}72$ Mr$.$ Gonzalez wishes to sell a bond that has a face value of $$1000.$ The bond bears

an interest rate of $8\%,$ with bond interests payable semiannually. Four years ago,

$$920$ was paid for the bond. At least a $9\%$ return $($yield$)$ on the investment is

desired. What must be the minimum selling price?

$4\mathrm{.}73$ Suppose you have the choice of investing in $(1)$ a zero$-$coupon bond, which costs