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

:$$51,300$

Semiannual operating cost : $$10,000$

Semiannual income

:$$20,000$

Salvage value

:$$20,000$

Life in years

:$4$ years

a$.|RR||=15\%$ semiannual

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

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

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