For f(x) = 2x + 3 and g(x) = 4x, find the following composite functions and state the domain of each. (a) fog (b) gof (c) fof (d) gog (a) (fog)(x) = (Simplify your answer.) 18 Given f(x)= and g(x)=√x, find the following expressions. X+7 (a) (fog)(4) (b) (gof)(2) (c) (fof)(1) (d) (gog)(0) (a) (fog)(4) = (Type an exact answer, using radicals as needed. Simplify your answer.) 5 find the following expressions. 2 x² +5 X (b) (gof)(2) (c) (fof)(1) (d) (gog)(0) (Type an integer or a simplified fraction.) Given f(x) = x and g(x)= (a) (fog)(4) (a) (fog)(4) =