Find the following: (g∘f)(0)=?

Question

Suppose that f(x)=4x^2+4x+4 and

g(x) = −4x+7 x < 2

4 2 ≤ x < 9

x+6 x ≥ 9

Find the following: (g∘f)(0)=?

Answer 1

f(0) = 4

g(4) = 4

so g(f(0)) = g(4) = 4