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10. Five cards are selected from an ordinary deck of 52 playing cards. Let X equal the number of spades and Y equal the number of hearts. Give the joint probability function of X and Y (a) If the sampling is without replacement. Be sure to specify the values of a and y for which Px.Y (x,y) is non-zero. (b) If the sampling is with replacement. Be sure to specify the values of r and y for which Pxx (x, y) is non-zero