This can be written:
x2/36+y2/4=1 so a=6 and b=2 (lengths of semi-major and semi-minor axes).
Eccentricity e=√(1-(b/a)2)=√(1-1/9)=√(8/9)=(2√2)/3.
Foci are (±ae,0)=(-4√2,0) and (4√2,0).
Vertices are (-6,0) and (6,0) and co-vertices are (0,-2) and (0,2).