Question 1 1 pts Consider the ways the function f (x) = x - 15, the cost of the shoes using the coupon, and the function? (x) = 0.80z, the cost of the shoes using the discount, can be combined to answer the following question. Which function could be used to represent the total cost of the shoes by applying the $15 coupon first and the 20% member discount second for original cost ? Of((a)) - 0.2 (2) - 15 O .(f (2)) - 0.8 (x -15) O s(f (2)) = 0.2(2 -15) Ofo ()) = 0.8 (2) 15