Which of the following is an identity element of the binary operation (*)? Possible Answers: e * b = e? e * b = eb e * b = b2 b* b = e e *b = b

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A: Note: According to our guidelines we can answer only first question

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A: we will use sub ring test.

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Q: 4 f4* u lt - i) + (+1) u(t -)

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