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5. Consider the matrix 1 1 2 A= 2 b 3 11 a/ . Which of the following is true? (a) rank(A)=1 if b = 2 and for every value of a (b) rank(A)=2 if b=2 and for every value of a #2 (c) rank(A)=1 if b=1 and a = 2 (d) rank(A)=1 if b = 2 and a = 2 (e) None of the above
4. The rank or 4. The rank of 13 2 3 11 1 3 il 1 2 -11. 3 3 -1 -1 0 2 ) (A) 1 (B) 2 4 (E) None of the above
9. The rank of 3 2 1 4 7 0 90 2 5 6 0 | 12 7 16 4 ) Is (A) 1, (B) 2, (C)3, (D) 4.