My analysis of the opponent's moves shows a pattern: after starting with paper in round 1, he then used rock for four rounds (rounds 2–5), switched to scissors for three rounds (rounds 6–8), and then returned to paper in round 9. This suggests a cyclical pattern where after a paper move the opponent might revert to rock—as he did from round 1 (paper) to round 2 (rock). Since rock appears most frequently in his sequence, it’s likely his round 10 will be rock. To beat rock, I choose paper.