What are the vertex, focus, and directrix of the parabola with the equation x^2+y^2-8x+4y+4=0?

vertex (4, –3); focus (4, –4); directrix y = –2vertex (–4, 3); focus (–4, –1); directrix y = 7vertex (4, –3); focus (4, –7); directrix y = 1vertex (–4, 3); focus (–4, 2); directrix y = 4