$($Related to Checkpoint $6\mathrm{.}6)($Present value of annuities and complex cash flows$)$ You are given three investment alternatives to analyze. The cash flows from these three investments are as follows:

Investment Alternatives

a$.$ What is the present value of investment A$.$ at an annual discount rate of $18$ percent?

$

$($Round to the nearest cent.$)$

b$.$ What is the present value of investment $B$ at an annual discount rate of $18$ percent?

$($Round to the nearest cent.$)$

c$.$ What is the present value of investment $C$ at an annual discount rate of $18$ percent?

$($Round to the nearest cent.$)$