Answer: 5 sets
Step-by-step explanation:
Since it takes Shawn 0.5 hours to finish a warmup, he will have 8.0-0.5 hours to play. Since he has 7.5 hours to play sets, and it takes 1.5 hours to finish 1 set, we divide 7.5 by 1.5. We receive 5 as an answer.
In conclusion, Shawn can play 5 sets