please answer clearly with a full proof!

Given the following initial positions for Wythoff's Game, determine which player has a winning strategy. If that player is player A, indicate an appropriate rst move for player A and specify the number of objects left in the piles after player A's move. Justify your answers. (a) First pile has two objects and second pile has six objects. (b) First pile has six objects and second pile has ve objects. (c) First pile has seven objects and second pile has four objects