# Let S be the set of all subsets of {1,2,3,4,5}, let z = {1,2,3}, and define XℛY to mean that X∩{1,3,5} = Y∩{1,3,5}.?

Update:

i apologize, the instructions for the questions "show that the given relation R is an equivalence relation on set S. Then describe the equivalence class containing the given element z in S, and determine the number of distinct equivalence classes of R

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