I have tried multiple times to figure out parts a and c. please help if possible and at the end there are helpful hints

Average Rate of Return, Cash Payback Period, Net Present Value Method

Great Plains Transportation Inc. is considering acquiring equipment at a cost of $296,000. The equipment has an estimated life of 10 years and no residual value. It is expected to provide yearly net cash flows of $37,000. The company's minimum desired rate of return for net present value analysis is 15%.

Present Value of an Annuity of $1 at Compound Interest
Year	6%	10%	12%	15%	20%
1	0.943	0.909	0.893	0.870	0.833
2	1.833	1.736	1.690	1.626	1.528
3	2.673	2.487	2.402	2.283	2.106
4	3.465	3.170	3.037	2.855	2.589
5	4.212	3.791	3.605	3.352	2.991
6	4.917	4.355	4.111	3.784	3.326
7	5.582	4.868	4.564	4.160	3.605
8	6.210	5.335	4.968	4.487	3.837
9	6.802	5.759	5.328	4.772	4.031
10	7.360	6.145	5.650	5.019	4.192

Compute the following:

a. The average rate of return, giving effect to straight-line depreciation on the investment. If required, round your answer to one decimal place. %

c. The net present value. Use the above table of the present value of an annuity of $1. Round to the nearest dollar. If required, use a minus sign to indicate negative net present value" for current grading purpose.

Present value of annual net cash flows	$
Less amount to be invested	$
Net present value	$

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Partially Correct

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a. Divide the estimated average annual income by the average investment. Net cash flow less the annual depreciation expense equals average annual income. Investment cost divided by two equals average investment.

b. Divide the amount to be invested by the annual net cash flow.

c. Subtract the cost from the present value of the annual net cash flow. (Use the present value of an annuity factor for 10 periods at 15%, Exhibit 2.)

Learning Objective 2, Learning Objective 3.