Please answer all parts! Thank you!

3. A domino is a tile game piece that has two halves, and each half has a number of dots on it, anywhere from 0 to 6 dots per half. To form a chain, you must line up your dominoes so that adjacent halves from different dominoes have the same number of dots. For example, the following three dominoes are arranged in a chain. 3. A domino is a tile game piece that has two halves, and each half has a number of dots on it, anywhere from 0 to 6 dots per half. To form a chain, you must line up your dominoes so that adjacent halves from different dominoes have the same number of dots. For example, the following three dominoes are arranged in a chain