Attorneys for Eastman Kodak argued in front of the U.S. Supreme Court to defend the company against charges levied by several independent firms that provide service for machines sold by Eastman Kodak. At issue was a decision by Kodak to limit the availability of replacement parts to these firms, making it more difficult for them to compete against Kodak in servicing Kodak machines. The suit alleged that Kodak unlawfully tied the sale of service for its machines to the sale of parts and, therefore, unlawfully monopolized and attempted to monopolize the sale of service and parts for such machines. Under which act do you think Kodak was charged?