Two firms, A and B, have four possible advertising strategies: newspapers, TV, posters, or no advertising. The possible changes in A's profits (in £million) from their current level are given in...

Two firms, A and B, have four possible advertising strategies: newspapers, TV, posters, or no advertising. The possible changes in A's profits (in £million) from their current level are given in the pay-offtable below. Assume A's gains are B' s losses; for exampte, if A advertises in newspapers and Bon TV, then A loses £0.5 million and B gains £0.5 million.

What combination of strategies does game theory predict?