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