Answer the following questions concerning the poset ({3, 5, 9, 15, 24, 45}, D (the divisibility relation on the set) 1. Find the maximal elements 3 5 9 15 24 45 2. Find the minimal elements 3 5 9 15 24 45 3. Find the minimum, if it exists 3 5 9 15 24 45 none 4. Find the maximum, if it exists 03 05 09 15 24 45 none 5. Find all upper bounds of {3,5} 3 5 9 15
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