Given f(x) = 6x and g(x) = 7x + 7, find the following expressions. (a) (fog)(4) (b) (g of)(2) (c) (f of)(1) (d) (gog)(0) .. . (a) (fog)(4) (Simplify your answer.) (b) (g o f) (2) = (Simplify your answer.) (c) (f o f) (1) = (Simplify your answer.) (d) (go g)(0) = (Simplify your answer.)