Which of the following are included in this year's GDP? Explain your answer in each case

a. Interest on an AT&T corporate bond.

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

c. The unpaid services of a family member in painting the family home.

d. The income of a dentist.

e. The money received by Smith when she sells her economics textbook to a book buyer.

f. The monthly allowance a college student receives from home.

g. Rent received on a two-bedroom apartment.

h. The money received by Josh when he resells his currentyear-model Honda automobile to Kim.

i. The publication of a college textbook.

j. A 2-hour decrease in the length of the workweek.

k. The purchase of an AT&T corporate bond.

l. A $2 billion increase in business inventories.

m. The purchase of 100 shares of GM common stock.

n. The purchase of an insurance policy.