4 Part 3 of 4 Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Answer the following questions for the poset ([2, 4, 6, 9, 12, 18, 27, 36, 48, 60, 72), 1). Find the least upper bound of (2, 9), if it exists. (You must provide an answer before moving to the next part.) Multiple Choice O O The least upper bound of (2, 9) does not exist. 72 18 36

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