What is the taxpayer's filing status for 2015 in each of the following situations? Bill's wife died in 2014. Bill maintained a household for his two dependent children in 2015. Bill is unmarried and lives in an apartment. He supported his aged parent, who live in a separate home. Bill provided over half of the cost of maintaining his parents' home and also provided over half of each of his parents' support. Bill is unmarried and maintains a household for his 18-year -old daughter and her husband. Bill pays over half of the support of his daughter. The daughter files a joint return with her husband. Indicate the filing status and the number of exemptions allowed