Problem $4.0(25$ Points$)$ A company is evaluating two options of buying delivery truck. Truck A has initial cost of $$35,000,$ its operating cost will be $$5500$ per year, and its salvage value after $3$ years will be $$7000.$ Truck $B$ has initial cost of $$42,000,$ an operating cost of $$5200,$ and a resale value of $$12,000$ after $4$ years. At an interest rate of $7\%$ which model should be chosen?