How do I calculate this problem on excel? Can you share the link to the excel file?

Harper Industries is examining a new project to manufacture cell phones. The company has examined several alternatives for the manufacturing process. With Process I, the company would manufacture the cell phone entirely in-house. This would require the highest initial cost and fixed costs. Process II would involve subcontracting the manufacture of the electronics. While this choice would reduce the initial cost and fixed costs, it would result in higher variable costs. Finally, Process III would subcontract all production, with Harper Industries only completing the final assembly and testing. Below you are given the information for each of the options available to the company. a. Calculate the NPV for each of the three manufacturing processes available to the company. b. What are the accounting break-even, cash break-even, and financial break-even points for each manufacturing process? c. What is the DOL for each manufacturing process? Graph the DOL for each manufacturing process on the same graph for different unit sales. Harper Industries is examining a new project to manufacture cell phones. The company has examined several alternatives for the manufacturing process. With Process I, the company would manufacture the cell phone entirely in-house. This would require the highest initial cost and fixed costs. Process II would involve subcontracting the manufacture of the electronics. While this choice would reduce the initial cost and fixed costs, it would result in higher variable costs. Finally, Process III would subcontract all production, with Harper Industries only completing the final assembly and testing. Below you are given the information for each of the options available to the company. a. Calculate the NPV for each of the three manufacturing processes available to the company. b. What are the accounting break-even, cash break-even, and financial break-even points for each manufacturing process? c. What is the DOL for each manufacturing process? Graph the DOL for each manufacturing process on the same graph for different unit sales