Wilson has been producing tennis racquets for many decades and continues to implement strategies that make it a leader in the tennis racquet industry. Suppose that when wilson and its largest rival, Head advertise, each company earns $0 billion in profits. When neither company advertises, each company earns profits of $8 billion. If one company advertises and the other does not, the company that advertises earns $48 billion and the company that does not advertise loses $1 billion. Under what conditions could collusion be profitable?