Need help with b and c. Thanks!

Amanda's Bakery plans to purchase a new oven for its store. The oven has an estimated useful life of 4 years. The estimated pretax cash flows for the oven are as shown in the table that follows, with no anticipated change in working capital. Amanda's Bakery has an 8% after-tax required rate of return and a 34% income tax rate. Assume depreciation is calculated on a straight-line basis for tax purposes using the initial investment in the oven and its estimated terminal disposal value. Assume all cash flows occur at year-end except for initial investment amounts. (Click the icon to view the estimated cash flows for the oven.) Present Value of $1 table Present Value of Annuity of $1 table Read the requirements. Requirement 1. Calculate (a) net present value, (b) payback period, and (c) internal rate of return. a. Net present value. (Use factors to three decimal places, X.XXX. Round intermediary calculations and your final answer to the nearest whole dollar.) The net present value is b. Payback period. (Round your answer to two decimal places.) The payback period in years is Data table Amanda's Bakery plans to purchase a new oven for its store. The oven has an estimated useful life of 4 years. The estimated pretax cash flows for the oven are as shown in the table that follows, with no anticipated change in working capital. Amanda's Bakery has an 8% after-tax required rate of return and a 34% income tax rate. Assume depreciation is calculated on a straight-line basis for tax purposes using the initial investment in the oven and its estimated terminal disposal value. Assume all cash flows occur at year-end except for initial investment amounts. (Click the icon to view the estimated cash flows for the oven.) Present Value of $1 table Present Value of Annuity of $1 table Read the requirements. Requirement 1. Calculate (a) net present value, (b) payback period, and (c) internal rate of return. a. Net present value. (Use factors to three decimal places, X.XXX. Round intermediary calculations and your final answer to the nearest whole dollar.) The net present value is b. Payback period. (Round your answer to two decimal places.) The payback period in years is Data table