The cost of a Frigbox refrigerator is $800, and depreciates $40 each year. The cost of an Arctic Air refrigerator is $1080, and it depreciates $110 per year.(a) Find an equation for the value of the Frigbox, F, t years after it is purchased.(b) Find an equation for the value of the Arctic Air, A, t years after it is purchased.(c) If a Frigbox and an Arctic Air are bought at the same time, when do the two refrigerators have equal value?