4. Consider the system of linear equations below. I1+2I2 I3=2 2$1+I2 I3=2 4$1+2$22$3=4 Create the augmented matrix [Alb]. Row reduce the augmented matrix to row reduced Ech- $1 elon form so that you can solve A11: = b, where a: = 1:2 . 333 5. Given below is a matrix equation X Y = Z , where X is an invertible matrix. Solve the matrix equation to nd the matrix Y. 6 2 3 1 2 0 1 2 1 1 Y 2 1 3 2 9 3 5 4 2 4 1