Determine the attributes of the hyperbola represented by this equation: (y-21)^2/20^2 - (x+20)^2/21^2 = 1

What are the vertices?

A. (-41,21) and (1,21)

B. (-20,0) and (-20,42)

C. (-20,1) and (-20,41)

D. (20,1) and (20,41)

The foci are

A. (-50,21) and (10,21)

B. (-20,-8) and (-20, 50)

C. (-20,-10) and (-20,52)

D. (20,-8) and (20,42)