Mark each statement True or False. Justify each answer.
(a) If is a partition of set S, then we can obtain a relation R on S by defining x Ry iff x and y are in the same piece of the partition.
(b) In any relation R on a set S, we always have xRx for all x ∈ S.
(c) If R is a relation on S, then {y ∈ S; yRx} determines a partition of S.
(d) If is a partition of S and x ∈ S, then x ∈ A for some A ∈.
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