Assume there was a valid offer made and the consideration requirement was met for each party. If, on the night of January 7, 2013, Mr. Baher contacted Mr. Star and said "I actually don't have $5,000,000, so my offer to pay you $5,000,000 is revoked," but Mr. Star still sends the acceptance letter and a copy of his birth certificate on January 8, 2013, would there be a valid contract? Explain.