Required:

$1-$a$.$ Compute the payback period for this equipment$-$

$1-$b$.$ Compute the net present value for this equipment$-$

$1-$c$.$ Compute internal rate of return for this equipment

$2.$ If Santana requires investments to have payback periods of four years or less, should she invest in this equipment?

$3.$ If Santana requires investments to have at least an $5\%$ internal rate of return, should she invest in this equipment?