Question: 4. Decide whether the following sets (with respect to appropriate operations) are rings, commutative rings, rings with unity, integral domains or fields. a. Z2 x

4. Decide whether the following sets (with respect to appropriate operations) are rings, commutative rings, rings with unity, integral domains or fields. a. Z2 x 3Z x M2 (R) b. Z3 x Q xR+ c. R X Z XZ

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