plz help me with this question

3. Consider the following signaling game, Where player one is of type A or type B, each with probability % Player one can go left and right and player two can go up an down. The payoffs are as follows: ((11,132) A B (left, up) a,1 (3,0 (left, down) b,0 d,1 (right, up) (3,1 a,0 (right, down) (1,0 b,1 (a) Give an order for a,b,c,d such that a separating equilibrium exists, but no pooling. (b) Give an order for a,b,c,d such that a pooling equilibrium exists (with suitable beliefs), but no separating. [3 + 3 Points]