Can you please do straight line depreciation instead of MACRS schedule for these questions? thank you!

One of the major revenue-producing items manufactured by Conch Republic is a smartphone. Conch Republic currently has one smartphone model on the market and sales have been excellent. The smartphone is a unique item in that it comes in a variety of tropical colors and is preprogrammed to play Jimmy Buffett music. However, as with any electronic item, technology changes rapidly, and the current smartphone has limited features in comparison with newer models. Conch Republic spent $1.2 million to develop a prototype for a new smartphone that has all the features of the existing one but adds new features such as Wifi tethering. The company has spent a further $250,000 for a marketing study to determine the expected sales figures for the new smartphone. Conch Republic can manufacture the new smartphone for $210 each in variable costs, Fixed costs for the operation are estimated to run $5.3 million per year. The estimated sales volumes are 64,000, 106,000, 87,000, 78,000, and 54,000 per year for each of the next five years, respectively. The unit price of the new smartphone will be $515. The necessary equipment can be purchased for $38.5 million and will be depreciated on a seven-year MACRS schedule. It is believed the value of the equipment in five years will be $5.8 million Net working capital for the smartphones will be 20 percent of sales and will occur with the timing of the cash flows for the year (i.e., there is no initial outlay for NWC). Changes in NWC thus will occur first in Year 1 with the first year's sales. Conch Republic has a 22 percent corporate tax rate and a required return of 12 percent. Shelly has asked Jay to prepare a report that answers the following questions: QUESTIONS 1. What is the payback period of the project? 2. What is the profitability index of the project? 3. What is the IRR of the project? 4. What is the NPV of the project