Two volunteers independently and simultaneously decide how much effort to contribute to a presidential campaign. Each has three possible effort levels: low (L), medium (M), and high (H). The payoffs to both volunteers are represented in the following matrix game: Volunteer 2 L M H ' D l] 4. 2 12, ' Volunteer l L ' ' .1; M- 21% 8,3 11, H 5J2\" Ell IQH} Notice that in this game the total payoff of the two volunteers always increases when either volunteer contributes more effort. At the same time, if the volunteers contribute different efforts, it is always better to be the one to contribute less. Underline the best responses in the box and nd the pure strategy Nash equilibria of this game. I."