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Exercise 16.4.1: Below are the vital statistics for four relations, W, X, Y, and Z: W(a,b) T(W) = 100 X(b,c) T(X) = 200 Y(c,d) T(Y)

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Exercise 16.4.1: Below are the vital statistics for four relations, W, X, Y, and Z: W(a,b) T(W) = 100 X(b,c) T(X) = 200 Y(c,d) T(Y) = 300 Z(d,e) T(Z) 400 Estimate the sizes of relations that are the results of the following expressions: (c) (f) 20(Y) d>10 (e) Wx Y

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