The expected average rate of return for a proposed investment of $4,580,000 in a fixed asset, using straight-line depreciation, a useful life of 20 years, no residual value, and an expected total income of $9,160,000 over the 20 years, is (round to two decimal places):
a) 10.53%
b) 20.00%
c) 8.42%
d) 5.00%