An investment has an installed cost of $$530,800.$ The cash flows over the four$-$year life

of the investment are projected to be $$218,850,$$$235,450,$$$202,110,$ and $$150,820,$

respectively.

a$.$ If the discount rate is zero, what is the NPV$?($Do not round intermediate

calculations.$)$

b$.$ If the discount rate is infinite, what is the NPV$?($A negative answer should be

indicated by a minus sign.$)$

c$.$ At what discount rate is the NPV just equal to zero? $($Do not round intermediate

calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,$

$32\mathrm{.}16.)$