Consider the following linear system. a-2b+ d = 5 -a + b c - 4d = 1 Create the augmented matrix of this system. -1 1 -2 0 -1 -4 1 Convert the system into one that exhibits the triangular structure 1 ? ? ? 01 ? ? ] where the? represent numerical values. 1 -2 0 5 0 1 1 3 -6 +1 Write the linear system corresponding to the simplified matrix above, then solve the linear system. (If your answer is dependent, use the parameters s and t as nece solution, enter NO SOLUTION.) [a, b, c, d] =