The cash flows of project A are as follows: $-150$ initial investment, $60,30,30,30,20,20,10.$ The cash flows of project B are as follows: $-190$ initial investment, $10,10,75,80,60,25,5.$

a$.$ What are the Internal Rates of Return for each project?

b$.$ Assume the required rates of return for both projects are identical, but the only thing you know is that the discount rate is some value between $8\%$ and $10\%.$ While considering your answer from part A$,$ which project $($if any$)$ should be undertaken?

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

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

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