Question: 3) Let A= (0,1,2,5,6,12,17,19,20} . Consider the relation E, (congruence mod 5) on A . a) [4] List the elements of the relation =, on

3) Let A= (0,1,2,5,6,12,17,19,20} . Consider the relation E, (congruence mod 5) on A . a) [4] List the elements of the relation =, on A . b) [2] Show why =, is an equivalence relation on A . c) [2] List the equivalence classes
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