Exercise 12-25 (Algorithmic) (LO. 7) Compute the additional Medicare tax for the following taxpayers. If required, round your answers to the nearest dollar. a. Mario, who is single, earns wages of $397,800. His additional Medicare tax is $fill in the blank 1 . b. George and Shirley are married and file a joint return. During the year, George earns wages of $195,800, and Shirley earns wages of $293,700. Their additional Medicare tax is $fill in the blank 2 . c. Simon has net investment income of $51,000 and MAGI of $255,000 and files as a single taxpayer. Simon's additional Medicare tax is $fill in the blank 3