The expected average rate of return for a proposed investment of $691,100 in a fixed asset with a useful life of 4 years, straight-line depreciation, no residual value, and an expected total income of $322,080 for the 4 years is (round to two decimal places) Oa. 23.30% Ob. 0.47% Oc. 0.93% Od. 11.65%