Suppose that f and g are differentiable functions with the values given below. If h(x)= f {g[sqrt(x)]} and k(x)= g[ 1/x ・f(2x)], show that h'(4)=3 and k'(1)=16..

x=2, f(x)=2, g(x)=2, f'(x)=3, g'(x)=4

I have no idea with this question.. Can anyone help me?? Please!!!