John and Janet Baker are married and maintain a household in which the following persons live: Calvin and Florence Carter and Darin, Andrea, and Morgan Baker.

• Calvin and Florence are Janet’s parents, who are retired. During the year, they receive $19,000 in nontaxable funds (e.g., disability income, interest on municipal bonds, and Social Security benefits). Of this amount, $8,000 is spent equally between them for clothing, transportation, and recreation (e.g., gym fees and travel), and the balance of $11,000 is invested in tax-exempt securities. Janet paid $1,000 for her mother’s dental work, and she paid the $1,200 premium on an insurance policy that her father owned on his own life. Calvin also incurred medical expenses, but he insisted on paying for them with his own funds.
• Darin is the Bakers’ 18-year-old son who is not a student but operates a poolcleaning service on a part-time basis. During the year, he earns $14,000 from the business, which he places in a savings account for later college expenses.
• Andrea is the Bakers’ 19-year-old daughter who does not work or go to school. Tired of the inconvenience of borrowing and sharing the family car, she purchased a Camaro for $21,000 during the year. Andrea used funds from a savings account that she had established several years ago with an inheritance from her paternal grandfather.
• Morgan is the Bakers’ 23-year-old daughter. To attend graduate school at a local university, she applied for and obtained a student loan of $20,000. She uses the full amount of the loan to pay her college tuition.

The Bakers’ fair rental value of their residence, including utilities, is $14,000, while their total food expense for the household is $10,500.

a. How many dependency exemptions are the Bakers entitled to claim for the year? Explain your answer.
b. From an income tax planning standpoint, how might the Bakers have improved the tax result?