11 What are the coordinates of the center and the length of the radius of the circle represented by the equation x^2 + y^2 - 4x + 8y + 11 = 0 ? 1) center (2,-4) and radius 3 2) center (-2,4) and radius 3 3) center (2,-4) and radius 9 4) center (-2,4) and radius 9