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Question: okay so could you please explain your steps for this...

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Okay so could you please explain your steps for this one too. I know I've already asked, but I was confused with how the person solved it. I am struggling with what steps I need to take and why so if you could be concise with your answer it helps me understand. Thanks!

Show that iff: A → B is injective and E show that equality need not hold if fis not injective. Show that iff: A → Bis surjective and show that equality need not hold if f is not surjective. A, then f-1(f(E) B, then f (f-1 (H))-H. Give an example to (a) E. Give an example to b)

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