4. (9 points) A table of values for f(x), g(x), f (x), and g (x) has been given. X f(x) g ( x) f (x) g (x) 0 4 3 2 -5 2 4 4 2 0 1 3 6 a) If h(x) = (f+g)(x), find h' (0). b ) If h(x) = f(x)g(x), find h' (1). f(x) c) If h(x) = find h' (1). g(x)