Tort Liability Luis and Barbara Chavez leased a house they owned in Arizona to Michael and Terry Diaz. The lease provided that no pets were to be kept on the premises without prior written approval of the landlords. The Diazes, without the landlords' consent or knowledge, kept a Pit Bull and another dog, which was half Pit Bull and half Rottweiler, at the leased premises. Two weeks later, the Diazes' two dogs escaped from the backyard and attacked and injured Josephine Gibbons. Gibbons sued the landlords for damages. Are the landlords liable? Are the tenants liable?