The following cash flows are estimated for two mutually exclusive projects.

year Project A CF Project B CF

$0-90000-150000$

$13000050000$

$24000050000$

$32000040000$

$42000040000$

Question $1-$ Find The Payback period for Project A and B Question $2-$ Find the Internal Rate of Return $($IRR$)\%$ for project A and B Question $3-$ Find the Profitablity Index if the discount rate is $6\%$ for both projects. If the Rate is lower than WHAT$\%$ crossover rate which project Which project should be selected?