You were asked to decide whether to accept or to reject one of the two following mutually exclusive projects $($note: you can accept only one, but not both projects$)$:

The projects will pay the following cash flows at the end of each year:

Year Project A Project B

$0-150-190$

$16010$

$23010$

$33075$

$43080$

$52060$

$62025$

$7105$

A$)$ What are the Internal Rates of Return for Project A and Project B$?$

B$)$ Assume that the required rates of return for both projects are identical, but the only thing you know is that the discount rate is a value between $8\mathrm{.}0\%$ and $10\mathrm{.}0\%.$ Can your answer in part $($A$)$ help you determine which project, if any, should be undertaken? Why or why not?

C$)$ Assume, instead, that the required return for both projects is $6\%.$ Which project, if any, should be undertaken and why?

D$)$ Assume, instead, that the required return for both projects is $6\%,$ but a project can be undertaken only if it pays back in $3$ years or faster. Which project, if any, should be undertaken and why?