Try this problem to see if you understand the concepts we just studied. The answer can be found at the bottom of the portfolio page. bought four bonds with face values of $1,000 each, simple interest rate of 5.8% per year, and a maturity date 10 years after they were issued. He paid $4, 725 3 years after the bonds were issued. If he keeps the bonds until maturity, find his total profit, and his percent return per year