Matrix A and B are row equivalentA = 4 0 -7 -7 -6 1 11 9 7 -5 10 19 -1 2 3 -1B = 4 0 -7 -7 0 1 0.5 -1.5 0 0 -4.95 -4.75 0 0 0 0.0404

(c) The reduced row echelon form of A shows that A has four pivots. ii. the columns of A are independent. the columns of A span all of R4. All of the above. v. None of the above