Aidan is not married. His mother, for whom he can claim an exemption, lived alone in an apartment. She died on September 2. The cost of maintaining her apartment for the year until her death was $6,000. Aidan and his brother were paying support and his mother had no income.

 How much of his mother's support would Aidan pay to declare head of household?

 Charlie and Marianne are over 65 years old. Your adjusted gross income is $100,000. During the year, their 35-year-old unmarried son, Lenny, lived with them while he attended college and earned $4,500. Charlie's mother, Elizabeth, lived with them until June 1 when she was placed in a nursing home indefinitely for medical care. Elizabeth received no income and was supported solely by Charlie and Marianne. 

Determine the number of exemptions Charlie and Marianne can claim on their joint return.