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Suppose that tuple r appears, respectively, x, y, and z times in the relations X, Y, and Z. Let t appear w times in the
Suppose that tuple r appears, respectively, x, y, and z times in the relations X, Y, and Z. Let t appear w times in the relation X [union] (Y n Z), where union and intersection are bag operations. There are several upper and several lower bounds on w, in terms of x, y, and z. What are all the bounds on w? Indicate which of the following inequalities is guaranteed to be true o b) w s max(x.yz) d) ws max(x.z)
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