Martha and Oleg are competitors in a local market and each is trying to decide if it is worthwhile to advertise. If both of them advertise, each will earn a profit of $5,000. If neither of them advertise, each will earn a profit of $10,000. If one advertises and the other doesn't, then the one who advertises will earn a profit of $15,000 and the other will earn $7,000. To earn the highest profit, Martha