Find the center, vertices, and foci of the ellipse with equation 2x2 + 8y2 = 16.

a) center: (0, 0); vertices: the point zero comma negative two square root two and the point zero comma 2 square root two ; foci: ordered pair 0 comma negative square root 6 and ordered pair 0 comma square root 6

b) center: (0, 0); vertices: (-8, 0), (8, 0); foci: ordered pair negative 2 square root 15 comma 0 and ordered pair 2 square root 15 comma 0

c) center: (0, 0); vertices: (0, -8), (0, 8); foci: ordered pair 0 comma negative 2 square root 15 and ordered pair 0 comma 2 square root 15

d) center: (0, 0); vertices: the point negative square root six comma zero and the point square root six comma zero ; foci: ordered pair negative square root 6 comma 0 and ordered pair square root 6 comma 0