@ Question 4 v 4 > A simple graph has vertices a,b,c,d,e,f with the following degrees: deg(a) = 3, deg(b) = 2, deg(c) = 4, deg(d) = 2, deg(e) = 3, deg(f) = 2. Form a possible edge set for the graph by selecting its elements below. [ {a,b} [ {b,c} (J{c,e} Ufa,c} U {b,d} U {e,f} [Jfa,d} [ {b,e? {d,e} [ {a,el U {b,f} U {d,f U e, d3 e