fix 4. Prove that H is a subgroup of G. Also prove (7) Let H≤ G, then the set aHa is a subgroup for each a € G, and HaHa-¹. TC

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Q: 07 : Pove equeivo lance. Partition equeivalonce Set casses the xelation. of the that from on 9. sef.

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A: answer is in next step

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