Assignment:
Suppose that a symmetric two-player game, in which each player has two pure strategies and all payoffs are nonnegative, is given by the following figure.
![1841_nonnegative.JPG](https://secure.tutorsglobe.com/CMSImages/1841_nonnegative.JPG)
What conditions on a, b, c, d guarantee the existence of an ESS?
Provide complete and step by step solution for the question and show calculations and use formulas.