"It turns out that we can also identify the type of solution from the reduced row-echelon form of the augmented matrix." Kuttler (the author) goes on to show what the reduced row-echelon form of the augmented matrix will look like when there is (a) no solution, (b) one solution, or (c) infinitely many solutions. Write justifications (informal explanations) for **why** these are true. (Hint! I like to think about it in terms of the system of equations that the reduced row-echelon form of the augmented matrix represents.)