NEED HELP WITH C$,$ D$,$ and E$.$

Requirements

Calculate the following for the special$-$purpose eye$-$testing machine:

a$.$ Net present value

b$.$ Payback period

c$.$ Internal rate of return

d$.$ Accrual accounting rate of return based on net initial investment

e$.$ Accrual accounting rate of return based on average investment

How would your computations in requirement $1$ be affected if the special$-$purpose machine had a $$11,000$ terminal disposal value at the end of $9$ years? Assume

depreciation deductions are based on the $$100,000$ purchase cost and zero terminal disposal value using the straight$-$line method. Answer briefly in words without

further calculations.