(a) Find the reduced row echelon form of the matrix $M$. Your answers must be fractions (decimals are not allowed). $$M = \left[\begin{array}{cccc} -3 &1 &-3 &3\cr 5 &-3 &2 &-1 \end{array}\right].$$


(b) Solve the matrix equation $$\left[\begin{array}{cc} -3 &1\cr 5 &-3 \end{array}\right] X = \left[\begin{array}{cc} -3 &3\cr 2 &-1 \end{array}\right].$$
$X =$ $\left[\Rule{0pt}{2.4em}{0pt}\right.$$\left]\Rule{0pt}{2.4em}{0pt}\right.$.