Question: [10 points] Suppose a 3 x 5 matrix A has reduced row-echelon form 2 0 -1 0 R = 0 01 -1 0 0 0

[10 points] Suppose a 3 x 5 matrix A has reduced row-echelon form 2 0 -1 0 R = 0 01 -1 0 0 0 01 If the first and fourth columns of A are 1 1 a1= 1 a4 = which of the three other columns are fully determined? (For those that are determined, what are they?)

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