Can you write a formula for each calculation? Please also provide an explanation. Thank you

PROBLEM 9-18. Internal Rate of Return with Uneven Cash Flows [LO 1] Palermo Pizzeria is considering expanding operations by establishing a delivery business. This will require the pur- chase of an oven that will cost $50,000, including installation. The oven is expected to last 5 years, have a $5,000 residual value, and will be depreciated using the straight-line method. Cash flows associated with the delivery business are as follows: Item Year 1 Year 2 Year 3 Year 4 Year 5 Revenue $65,000 $66,300 $78,230 $88,000 $95,238 Ingredients (25,100) (27,600) (30,392) (33,441) (36,695) Salary (24,900) (26,900) (28,900) (30,900) (32,800) Additional misc. (2,100) (2,300) (2,500) (2,700) (2,800) Residual value 5,000 In addition to the above, there are tax consequences related to the new business, and the company's tax rate is 40 percent REQUIRED Calculate the internal rate of return for the delivery business. (Hint: Try a range of rates between 8 percent and 15 percent.) Should Palermo Pizzeria invest in the delivery business if the required rate of return is 10 percent