$3.$ Ralph Cosmetics has a $$539,928$ liability it must pay four years from today. The company is opening a savings account so that the entire amount will be available when this debt comes due. The plan is to make an initial deposit today and then deposit an additional $$73,471$ at the end of each of the four years. The account pays a $5$ percent rate of return. How much does the firm need to deposit today?

$4.$ Leront's, Inc. had earnings per share of $$3\mathrm{.}00.$ The company plows back $60\%$ of its earnings onto projects returning $12\%.$ If you require a rate of return of $10\%,$ how much are you willing to pay today to purchase one share of Leront's stock? $$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$