to find the average growth factor over 5 years of an investment in a mutual fund with growth rates of 10% the first year, 11.3% the second year, 14.3% the third year, 4.6% the fourth year, and 5.8% the fifth year, take the geometric mean of 1.1, 1.113, 1.143, 1.046, and 1.058. find the average growth factor of this investment.