For each of the following activities, identify the flow of goods and services or factors of production as either household-to-firm or firm-to-household.
Yakov earns $8 per hour working at a fast-food restaurant.
Juanita earns a profit of $5,000 from her grocery bus mass.
Ana pays a storekeeper $2 for a quart of yogurt.
Dina spends $100 for a piano lesson.