What’s the answer to this question?

Answer:
Your answer is letter b ($11.82).
Step-by-step explanation:
Steps:
1. Find the differences between consecutive weeks' earnings (weeks 3-6). You will do week 4- week 3, week 5- week 4, and week 6- week 5.
2. Add the differences.
3. Divide this number by 3. This will give you your answer.