Blue Duck Plumbing Ltd has identified the following two mutually exclusive projects:

(a) What is the IRR for each of these projects? If you apply the IRR decision rule, which project should the company accept? (b) If the required rate of return is 11%, what is the NPV for each project? If you apply the NPV decision rule, which project should the company accept? (c) Comment on your decisions in (a) and (b) above.

please don't use excel formulas show full wwrkings

\begin{tabular}{|c|r|r|} \hline Year & Project A cash flow & Project B cash flow \\ \hline 0 & $77,500 & $77,500 \\ \hline 1 & 43,000 & 21,500 \\ \hline 2 & 29,000 & 28,000 \\ \hline 3 & 23,000 & 34,000 \\ \hline 4 & 21,000 & 41,000 \\ \hline \end{tabular}