Question

The functions f and g and h are differentiable. Evaluate (g ∘ f ∘ h) '(4), given that:
f(2) = 2 f ' (2) = 2
f(3) = 4, f ' (3) = 3
f(4) = 3, f ' (4) = 3
g(2) = 4, g ' (2) = 4
g(3) = 3, g ' (3) = 3
g(4) = 3, g ' (4) = 3
h(2) = 4, h ' (2) = 2
h(3) = 3, h ' (3) = 4
h(4) = 2, h ' (4) = 4