The stuart corporation has excess cash to invest in one of two securities. the company's tax rate is 40 percent. the first alternative is a 10-year, 10 percent coupon bond (with semiannual interest payments) that has a current price of $1,000 and a yield of 10 percent. the second alternative is the preferred stock of pickett corp. which promises to pay a before-tax return of 9 percent. what is the after-tax nominal return of the better investment alternative?