Let r(x) = f(g(h(x))), where h(1) = 2, g(2) = 3, h'(1) = 4, g'(2) = 3, and f'(3) 7. Find r'(1) %3D %3D %3D r'(1) = %3D

Recall:

• The derivative of a composition is the product of the derivative of the outer function ( with the inner function is plugged in) and the derivative of the inner function.                                                                                                                               $\mathbf{i}\mathbf{.}\mathbf{e}\mathbf{,}\mathbf{ }{\left[f\right(g\left(x\right)\left)\right]}^{\mathbf{\text{'}}}\mathbf{ }\mathbf{=}\mathbf{ }\mathbf{f}\mathbf{\text{'}}\mathbf{\left(}\mathbf{g}\mathbf{\right(}\mathbf{x}\mathbf{\left)}\mathbf{\right)}\mathbf{.}\mathbf{g}\mathbf{\text{'}}\mathbf{\left(}\mathbf{x}\mathbf{\right)}$