The expected average rate of return for a proposed investment of $4,120,000 in a fixed asset, using straight-line depreciation, a useful life of 20 years, no residual value, and an expected total income of $8,240,000 over the 20 years, is (round to two decimal places)

a.20.00%

b.10.00%

c.40.00%

d.1.00%