Betty, age 35 , is thinking about investing for retirement. She plans to retire at age 65 . At that time, she will need $2.40 million in assets. She has calculated that inflation will average 2.20% over her lifetime. If she can earn an average annual rate of return of 9.65%, what will be her real rate of return? 7.29% 7.45% 7.65% 4.89%