A = (1,2, 3,4,5, 6,10, 12, 15, 20, 30,60}, where xRy means xly. a) Draw the Hasse diagram for R. b) Find all maximal and minimal elements. c) Find upper bound of {6,12}. d) Find lower bound of {6,12}. e) Find lub({6,12}) and glb({6,12}). f What is the least element? The greatest element?

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