Answer: 547 yellow tablets
Step-by-step explanation:
The three-week moving average would use the average of the tablets in the last three weeks before the 5th weeks to calculate the average for the 5th week.
= (Week 2 + Week 3 + Week 4) / 3
= (380 + 580 + 680) / 3
= 1,640 / 3
= 546.7
= 547 yellow tablets