NEED HELP ASAP

Let fix)-g(x). H(x) where g(x) is a linear function with an x-intercept of 2 and a slope of 4, and h(x) is a quadratic function with vertex (-2,-8) passing through the origin. What is f(x)?

A. F(x)=8x^3+36x^2+16
B.f(x)=4x^3-16x
C.f(x)=4x^3+8^2-32x
D.f(x)=8x^3+16x^2-64x