only my payback period for part D is right everything else is wrong can you please help?

HR my work Problem 10-22A (Algo) Effects of straight-line versus accelerated depreciation on an investment decision LO 10-2, 10-4 -3552 Munoz Electronics is considering investing in manufacturing equipment expected to cost $300,000 The equipment has an estimated useful life of four years andra salvage value of $ 17,000. It is expected to produce incremental cash revenues of $150,000 per year. Munoz has an effective income tax rate of 40 percent and a desired rate of return of 12 percent (PV. of $1 and PVA of S1) (Use appropriate factor(s) from the tables provided.) Required a. Determine the net present value and the present value index of the investment, assuming that Munoz uses straight-line depreciation for financial and income tax reporting b. Determine the net present value and the present value index of the investment, assuming that Munoz uses double-declining- balance depreciation for financial and income tax reporting d. Determine the payback period and unadjusted rate of return (use average Investment), assuming that Munoz uses straight-line depreciation e. Determine the payback period and unadjusted rate of return (use average investment), assuming that Munoz uses double-declining- balance depreciation (Note: Use average annual cash flow when computing the payback period and average annual income when determining the unadjusted rate of return) Complete this question by entering your answers in the tabs below. Req A and B Reg D and E Determine the payback period and unadjusted rate of return (use average investment), assuming that Harper uses straight- line depreciation and double-declining-balance depreciation. (Note: Use average annual cash flow when computing the payback period and average annual income when determining the unadjusted rate of return.) (Round your answers to 2 decimal places.) Show less Payback period Unadjusted rate of return 0.30% 0.30 % d. 2.54 years 2.04 years