State whether each set is bounded below, bounded above, bounded or unbounded for: 1 A = {r R|r =, for some n e Z1pts] !! B = {z R|2 = 2", n Z}[lpts] Ex.2 Show that every nonempty subset of Z that is bounded above has a max element. [2 pts) Ex.3 If z Z, show there is exactly one n Z so that n - 1 1, z, y R, show there is at least one n Z so that y