A factory owner buys a new machine for $ 8000 . After ten

A factory owner buys a new machine for $8000 . After ten years, the machine has a salvage value of$ 500 .a. Assuming that the linear depreciation is as indicated in the figure above. Find a formula for the value V of the machine after t years, where 0 <= t <= 10 .b. Use the formula derived in part (a) to find the value of the machine after five years.