In popular "left brain, right brain" belief, musical and artistic creativity are governed by which part of the brain?

Which founder of the Mormon church was murdered by a mob in 1844? Which freighter that sank in Lake Superior in 1975 was named for a Milwaukee civic leader? Which future president shot Charles Dickinson dead in an 1806 duel and took a bullet himself? Which Hall of Fame jockey, who died in 2003, said Spectacular Bid was "the best horse I ever sat on"? Which spiny insectivore has a synonym for "pig" in its name, reportedly for its grunting as it forages in hedges? Which instrument, often attached to an inflatable cuff, is used to measure blood pressure? Which Irish poet of "The Winding Stair" shared his middle name with his painter brother Jack and their father, John? Which American automaker trades on the New York Stock Exchange under a one-letter stock symbol?