B. Solve the following
1. f(x) = 12x - 7; f(3) = ?
2. h(x) = | x+2 | ; (-3) = ?
3. f (x) = 3x -2 ; find f(x-2).
4. g(x) = x2 -3x + 2; find g(x+1)
5. f(x) = x² & g(x) = 2x - 1; find f(g(-2))​