Let a1 [:1. a2 = =]. as = [ ]. and b = [31 Determine whether b can be written as a linear combination of a1, a2, and a3. In other words, determine whether weights x1, X2, and x3 exist, such that x1 a1 + X2 a2 + X3 a3 = b. Determine the weights x1, X2, and x3 if possible. OA) It is a linear combination with weights x1 = 2, X2 = 1, X3 = N/W (B) It is not a linear combination. C) It is a linear combination with weights x1 = 0, x2 = 0, x3 = 1 D) It is a linear combination with weights x1 = -2, x2 = -1, X3 = 2