I am in an Economic Analysis in the workplace class and need to have this problem workd out by hand please include a cash flow diagram timeline and all hand written work with present or future value formulas please!

A small manufacturing company is evaluating trucks for delivering their product. Truck A has first cost of $32000, its operating cost will be $5500 per year, and its salvage after 3 years will be $7000. Truck B has a first cost of $37000, an operating cost of $5200, and a resale value of $12000 after 4 year. At an interst rate of 12% which model should be chosen?