Find and classify the critical point of the linear system below. dx - 4x + y - 17 dt dy - 17x-2y-91 dt The critical point occurs at (Simplify your answer. Type an ordered pair.) The critical point is a/an (Simplify your answer. U because the eigenvalue(s) r = asymptotically stable spiral point unstable spiral point unstable improper node unstable proper node or improper node unstable saddle point asymptotically stable improper node stable center asymptotically stable proper node or improper node swer, using radicals and i as needed.)