What is the product of the elementary matrix EEE representing R2→R2−3R1R_2 \to R_2 - 3R_1R2→R2−3R1 for a 2×22 \times 22×2 matrix?
(10−31)\begin{pmatrix} 1 & 0 \\ -3 & 1 \end{pmatrix}(1−301)
(1−301)\begin{pmatrix} 1 & -3 \\ 0 & 1 \end{pmatrix}(10−31)
(011−3)\begin{pmatrix} 0 & 1 \\ 1 & -3 \end{pmatrix}(011−3)
(−3110)\begin{pmatrix} -3 & 1 \\ 1 & 0 \end{pmatrix}(−3110)