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Problem. Let set A={a,b,c,d}. We define three relations R1,R2 and R3 on A. They are represented as follows respectively in three directed graphs from left

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Problem. Let set A={a,b,c,d}. We define three relations R1,R2 and R3 on A. They are represented as follows respectively in three directed graphs from left to right: Figure 1: Left: R1. Middle: R2. Right: R3. Answer the following questions: 4. Which of the following is/are correct regarding lattice? (a) [{1,2,3,6,9,18},/] is a bounded lattice (b) [I,

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