Write the linear system whose augmented matrix is [ 2 1 3 4 | 0, 3 -1 2 0 | 3, -2 1 -4 3 | 2].
a) 2x + y + 3z = 4, 3x - y + 2z = 0, -2x + z - 4w = 3
b) 2x + y + 3z = 0, 3x - y + 2z = 3, -2x + z - 4w = 2
c) 2x + y + 3z = 3, 3x - y + 2z = 0, -2x + z - 4w = 4
d) 2x + y + 3z = 4, 3x - y + 2z = 3, -2x + z - 4w = 2