1. Find the vertex of the parabola f(x) = x2 - 16x + 63
2. Find the x- and y-intercepts of the cubic function f(x) = (x+4)(2x-1)(x-1)
3. If f(x) = x2-2x-24 and g(x) = x2-x-30, find (f-g)(x)
4. If f(x) = x+4 and g(x) = 2x2-x-1, evaluate the composition (g o f)(2)