p.658, icon at Example 20 #1. Referring to this Hasse diagram of a partially ordered set, find the following: (a) all upper bounds of {d, e}. (b) the least upper bound of {d, e}. (c) all lower bounds of {a, e, g}. (d) the greatest lower bound of {a, e, g}. (e) greatest lower bound of {b, c, f}. (f) least upper bound of {h, i, j}. (g) greatest lower bound of {g, h}. (h) least upper bound of {f,i}. b h a f d 6.0 g j

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