question 2

 

Problem. Let set A=(abcd). We define three relations RR and RunA. They are represented as follows respectively in three directed graphs from left to right Answer the following questions Figure 1: Left: Middle R. Right 1. Use matrices to represent each of Rand 2. For each of first briefly judge if it is a partial order. Thes If yes draw its Hasse Diagram (Hint: Mind the arrows) If not, find the property it lacks and directly write out its cloure upon that property.