or is as to invest $5400 in a friend's business with the promise that the friend will repay 5009 and $40, and one years time I want to find her best alternative to invest with some more risk is one that will pay her $5830 in one years time US securities of some more terms off a radar return of 6% what is opportunity cost of capital in this case 88% B 10% C6% D9 percent