8. Let A = { #, $, %, * }, B= { a, b, c, d }, and R= { (#, a), ($, a), (%, d) , (*, b), (*, c) } 6 points a) Construct a mapping diagram for R. True / False : R is a function True / False : R is everywhere defined True / False : R is onto True / False : R is one-to-one 9. Consider the partial order depicted by the Hasse Diagram. h 8 points a) List any minimal elements. g b) If one exists, what is the greatest element? e c) What are the Upper Bounds of the set { c, d }? d) If one exists, what is the Least Upper Bound of the set { c, d }