Brooks Clinic is considering investing in new heart-monitoring equipment. It has two options. Option A would have an initial lower cost but would require a significant expenditure for rebuilding after 4 years. Option B would require no rebuilding expenditure, but its maintenance costs would be higher. Since the Option B machine is of initial higher quality, it is expected to have a salvage value at the end of its useful life. The following estimates were made of the cash flows. The company's cost of capital is 6%. Option A Option B Initial cost $181,000 $283,000 Annual cash inflows $73,000 $82,400 Annual cash outflows $30,200 $25,100 Cost to rebuild (end of year 4) $48,000 $0 Salvage value $0 $8,300 Estimated useful life 7 years 7 years Click here to view the factor table. (a) Your answer is partially correct. Compute the (1) net present value, (2) profitability index, and (3) internal rate of return for each option. (Hint: To solve for internal rate of return, experiment with alternative discount rates to arrive at a net present value of zero.) (If the net present value is