A box has numbers from 1 to 10. A number is drawn at random. Let X1 be the number drawn. This number is replaced, and the ten numbers mixed. A second number X2 is drawn. Find the distributions of X1 and X2. Are X1 and X2 independent? Answer the same questions if the first number is not replaced before the second is drawn.

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-1 -1 0 1/18 1/36 1/6 1/12 0 1/18 0 1/36 1/6 1/12 0 1/12 2 1/12 1/6