Andrea is an employee of Fern Corporation and single. She also has her own business working as a life coach. For 2021 , Andrea's wages from Fern were $252,000. Her self-employment income was $65,000. If required, round any computations to two decimal places. Round final answers to the nearest dollar. a. Compute the total payroll, self-employment, and additional Medicare taxes for Andrea for 2021. b. Assume the same facts except that Andrea's 2021 self-employment activities resulted in a loss of $44,200. Compute the total payroil, self-employment, and additional Medicare taxes for Andrea for 2021. c. Compute Andrea's NIIT for 2021 using wages of $252,000, self-employment income of $65,000 and NII of $39,600. There are no expenses allocable to any ifvestment income