Examine the following NPV curve and answer the following questions:

Figure $1$ NPV

$($a$)$ At a $4\mathrm{.}0\%$ cost of capital, is Project A a positive NPV project? Project B$?$

$($b$)$ What is the IRR of Project A$?$ Project $B?$

$($c$)$ At what cost of capital are the NPVs of the $2$ projects roughly equal?

$($d$)$ Assuming you expect interest rates to remain in the $7-10\%$ range over the horizon of

these projects, should you invest in Project A$,$ Project B$,$ or neither? Explain.