Exercises 1 and 2 use the notation of Example 1 for matrices in echelon form. Suppose each

Question:

Exercises 1 and 2 use the notation of Example 1 for matrices in echelon form. Suppose each matrix represents the augmented matrix for a system of linear equations. In each case, determine if the system is consistent. If the system is consistent, determine if the solution is unique.
1. a.

b.

2. a.

b.