Nash Equilibrium

Libertyville has two optometrists, Dr. Smith (S) and Dr. Jones (S). Each optometrist can choose to advertise his service or not. The net revenue to each optometrist, in thousands of dollars, is listed on the payoff matrix. Does a Nash equilibrium exist for this game? If so, identify the Nash equilibrium and justify your answer. If not, explain why a Nash Equilibrium does not exist for this game