Which of the following are included in this year's GDP? Which are excluded? Explain your answers.

a. Interest received on an AT&T corporate bond.

b. Social Security payments received by a retired factory worker.

c. Unpaid services of a family member who painted the family home.

d. Income of a dentist from the dental services she provided.

e. A monthly allowance a college student receives from home.

f. Money received by Josh when he resells his nearly brand-new Honda automobile to Kim.

g. The publication and sale of a new college textbook.

h. An increase in leisure resulting from a 2-hour decrease in the length of the workweek, with no reduction in pay.

i. A $2 billion increase in business inventories.

j. The purchase of 100 shares of Alphabet (the parent company of Google) stock.