Calculus

This is a large problem, sorry for the trouble.

if f(x) = sqrt(x^3 + 5x + 121)(x^2 + x + 11)

Find fprime/derivative of/at 0

I keep getting 16 which is not one of the multiple choice answers available.

My last step is [sqrt(121)(1)] + [{5/sqrt(121)}(11)]

What am I doing wrong?

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