Find the vertex v and the x-intercepts x^1 and x^2 of the quadratic function f(x) = 2x^2 - 8x.

a.
v(2, -8); x^1 = 0, x^2 = 4

b.
v(2, -4); x^1 = 0, x^2 = 4

c.
v(0, 0); x^1 = -2, x^2 = 4

d.
v(0, 0); x^1 = 2, x^2 = -8