The expected average rate of return for a proposed investment of $4,890,000 in a fixed asset, using straight-line depreciation, with a useful life of 20 years, no residual value, and an expected total net income of $14,670,000 over the 20 years is (round to two decimal points). Oa. 60.00% Ob. 1.50% Oc. 30.00% Od. 15.00%