Question: 7. Let R be the relation represented by the matrix 0 1 01 L1 1 0J Find the matrices that represent a. R2 b. R3

7. Let R be the relation represented by the matrix 0 1 01 L1 1 0J Find the matrices that represent a. R2 b. R3 c. R4 Let R1 and R2 be relations on a set A-fa, b, c) represented by these matrices, [0 1 0] MR1-1 0 1 and MR2-0 1 1 1 1 0 Find the matrix that represents R1 o R2. DISCRETE MATHEMATICS 8. Determine whether the relation with the directed graphs shown is an equivalence relation. (3 marks) 9. Find the lexicographic ordering of these strings of lower-case English letters a) quack, quick, quicksilver, quicksand, quacking b) open, opener, opera, operand, opened

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