6. [-/7 Points] DETAILS SALGTRIG4 12.3.011. An equation of a hyperbola is given. yz x2 = 1 81 9 (a) Find the vertices, foci, and asymptotes of the hyperbola. (Enter your asy vertex ( x, y ) = (smaller y-value) vertex ( x, y ) = (larger y-value) focus ( x, y ) = (smaller y-value) focus ( x, y ) = (larger y-value) asymptotes (b) Determine the length of the transverse axis. (c) Sketch a graph of the hyperbola. y 15/ 10 5 X