A project with the following costs are under consideration to determine its profitability. Using the IRR comparison, and an annual MARR compounded semiannually, determine if the project should be executed. First cost: $$52,000$ Semiannual operating cost: $$10,000$ Semiannual income: $$20,000$ Salvage value: $$20,000$ Life in years: $4$ years a$.$ IRR $=17\%$ semiannual b$.$ IRR $=5\%$ semiannual c$.$ IRR $=18\mathrm{.}7\%$ semiannual d$.$ IRR $=15\mathrm{.}3\%$ semiannual