Question: Let A be a 6 5 matrix with linearly independent column vectors a1, a2, a3 and whose remaining column vectors satisfy a4 = a1

Let A be a 6 × 5 matrix with linearly independent column vectors a1, a2, a3 and whose remaining column vectors satisfy
a4 = a1 + 3a2 + a3, a5 = 2a1 - a3
(a) What is the dimension of N(A)? Explain.
(b) Determine the reduced row echelon form of A.

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