don't solve it by excel please !

In the use of unmanned aerial vehicles (UAVs) that will shape the future of UAV applications, an online shopping company has purchased a group of UAVs for $ 53,000. The market value is expected to decrease by $ 3000 per year. Also, the UAVs will be depreciated within a 5 years. As cargo drones are a proven technology for the logistics industry, it is expected that the purchase of the group of UAVs will increase the company's revenue by $ 14,000 annually. Although, there is an expectation about the related operating expenses to be $ 26,500 annually to operate fee-charging UAV services at certain times, the online shopping company's effective income tax rate of is 40%, and its after-tax MARR is 15% per year. The company decides to use the cargo drones for 5 years to simplify the transportation of goods while offering faster, more environmentally friendly service than the alternative. a) (20 points) What would be the equivalent after-tax annual worth of this investment? b) (20 points) Is this investment profitable? Write your comments about your results