Please help answer using formulas and not in excel so that way I can understand. Please be specific in how you arrive at each number.

Z Company is planning to purchase a system capable of deploying Artificial Intelligence for monitoring the company's transactions for accuracy and misuse. The expected cost of this system is $165,000, and it is expected to have a useful life of 6 years and an estimated salvage value of $26,500. The system is expected to produce cash savings of $57,000 per year in reduced labor costs and the cash operating costs to run this system are estimated to be $17,000 per year. Assuming Company X is in the new 21% tax bracket and has a minimum desired rate of return of 12% on this investment. Please show work. Determine the: 1. (a) payback period, (b) ARR, and (c) NPV (Ignoring taxes), and 2. (a) payback period, (b) ARR, and (c) NPV (Assuming taxes)