3. Draw a circular-flow diagram. Identify the parts of the model that correspond to the flow of goods and services and the flow of dollars for each of the following activities.

a. Sam pays a storekeeper $1 for a quart of milk.

b. Sally earns $4.50 per hour working at a fast food restaurant.

c. Serena spends $7 to see a movie.

d. Stuart earns $10,000 from his 10 percent ownership of Acme Industrial.