A project with the following costs are under consideration to determine its profitability. Using the IRR comparison, and an annual MARR of $10\%$ compounded semiannually, determine if the project should be executed.

First cost: $$49,000$

Semiannual operating cost: $$10,000$Semiannual income: $$20,000$

Salvage value: $$20,000$

Life in years: $4$ years

a$.$ IRR $=15\mathrm{.}83\%$ semiannual

b$.$ IRR $=17\%$ semiannual

c$.$ IRR $=16\mathrm{.}9\%$ semiannual

d$.$ IRR $=18\mathrm{.}7\%$ semiannual