Question: Let A= { a, b, c, d }.Define an equivalence relation R on the power set P (A) as follows:For X,Y P(A), we let XRY

Let A= {a, b, c, d}.Define an equivalence relation R on the power set P(A) as follows:For X,Y P(A), we let XRY if and only if X and Y have the same number of elements. (I leave it to you to convince yourself this is an equivalence relation.)

(a) List the elements in the equivalence class [{a, b, c}].

(b) List the elements in the equivalence class [{b, c}].

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