2. Let fixey and giY-2 bo arbitrary maps of suts (a) Show that it f and I are injuctive so is the composition of got then (b) Show that if f- and I are surjective is the composition of gof. tion so (C) Show that if I and so is the thon so is (gof) = f'og are bijective tion g of and 9 composi

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