Ineed the answer for this question because i didn’t understand

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

How do i do this activity, is appreciated

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?