Mark can play the piano, climb a tree, and use a computer. He can't ride a horse. Sally can use a computer, but she can't play the piano, climb a tree, or ride a horse. Peter can climb a tree and ride a horse, but he can't play the piano or use a computer. Brian can play the piano and ride a horse, but he can't climb a tree or use a computer. Meg can use a computer, but she can't play the piano, climb a tree, or ride a horse.