give an augmented matrix for the system of equations, and give its size.

1. x+y=-5

4y+z=3

x-z=4

2. x+y =3

4y+z=-5

x-z=4

3. x+y=3

x+4y+z=4

x-z=-5

4. x+y+z=3

x+4y+z=-5

x+y-z=4