Alex Golfer is a professional golfer living in Florida. He entered into a sponsorship agreement with ARS, a Michigan partnership. Among other things, the agreement provided that ARS would provide health insurance for Alex. Sponsorship negotiations were carried out mostly over the phone. ARS drew up the agreement in Michigan and sent it to Alex in Florida, via mail; Alex signed and returned the contract to ARS via mail as well. While playing golf in a tournament in California, Alex suffered a heart attack and, as a result, incurred costs of more than $100,000 for open-heart surgery and related medical expenses. Since ARS had not obtained health-insurance coverage for Alex, he seeks to sue ARS for breach of the agreement. Which of the state courts - Michigan, California, and Florida - have jurisdiction over the case? Discuss your conclusion and give your reasoning.