please help me with this

Pappy's Potato has come up with a new product, the Potato Pet (they are freeze-dried to last longer). Pappy's paid $220,000 for a marketing survey to determine the viability of the product. It is felt that Potato Pet will generate sales of $935,000 per year. The fixed costs associated with this will be $244,000 per year, and variable costs will amount to 24 percent of sales. The equipment necessary for production of the Potato Pet will cost $950,000 and will be depreciated in a straight-line manner for the four years of the product life (as with all fads, it is felt the sales will end quickly). This is the only initial cost for the production. Pappy's has a tax rate of 25 percent and a required return of 16 percent. a. Calculate the payback period for this project. Note: Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16. b. Calculate the NPV for this project. Note: Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16. c. Calculate the IRR for this project. Note: Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16. McGilla Golf has decided to sell a new line of golf clubs. The clubs will sell for $950 per set and have a variable cost of $475 per set. The company has spent $310,000 for a marketing study that determined the company will sell 91,000 sets per year for seven years. The marketing study also determined that the company will lose sales of 9,150 sets per year of its high-priced clubs. The high-priced clubs sell at $1,380 and have variable costs of $700. The company will also increase sales of its cheap clubs by 11,900 sets per year. The cheap clubs sell for $384 and have variable costs of $174 per set. The fixed costs each year will be $15,450,000. The company has also spent $2,600,000 on research and development for the new clubs. The plant and equipment required will cost $55,800,000 and will be depreciated on a straight-line basis. The new clubs will also require an increase in net working capital of $4,175,000 that will be returned at the end of the project. The tax rate is 21 percent, and the cost of capital is 14 percent. Calculate the payback period, the NPV, and the IRR. Note: Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16. Enter your IRR answer as a percent