Compute the additiona/ Medicare tax for the following taxpayers. If required, round your answers to the nearest dollar. a. Mario, who is single, earns wages of $494,600. His additional Medicare tax is $ b. George and Shirley are married and file a joint return. During the year, George earns wages of $152,400, and Shirley earns wages of $228,600. Their additional Medicare tax is $ c. Simon has net investment income of $51,840 and MAGI of $259,200 and files as a single taxpayer. Simon's additional Medicare tax is $