Let v1, v2, v3, v4 be vectors in 4. Let A = [v1 v2 v3 v4] be the matrix formed with these vectors as columns. State a condition on the row echelon form of A that tells us if the vectors are linearly dependent. Suppose A ~ Are the vectors linearly dependent? If so, write one vector as a linear combination of the other vectors. In the setting of (b), are the vectors v1, v2, v4 linearly independent? Make sure you justify your answer.