Let S = a₁, 92, 93, 94 and A = (a₁, az, az, a4), where {a₁ a -2 3 -0-0-0-0 2 -4 = = = = 92 a 3 7 -5 2 b 2 4 1. Determine whether AX = b is consistent, where X = (x₁, x2, X3, X4) T. 2. Determine whether the vector 6 is a linear combination of S. =