Barton Vader is a Canadian citizen who has always lived in London, Ontario. He has a spouse and two school-aged children. As of May 2019, he accepts a new employment position in Akron, Ohio. On October 1, 2019, he moves to Akron to locate housing for his family. In order for his children to finish the school term, his family remains in London until January 1, 2020. When they move, John severs all residential ties with Canada other than the family residence. The residence is placed on the market in January, 2020. However, it has not been sold as of December 31, 2020. (a) Briefly explain the factors that determine residency in Canada for personal income tax purposes. (b) Would Mr. Vander be considered a Canadian resident for income tax purposes? How would he be taxed?