Let matrix $B = \begin{bmatrix} 9 & -6 \\ 15 & 0 \end{bmatrix}$. What is the result of multiplying matrix $B$ by the scalar $\frac{1}{3}$?

\begin{bmatrix} 3 & -2 \\ 5 & 0 \end{bmatrix}

\begin{bmatrix} 27 & -18 \\ 45 & 0 \end{bmatrix}

\begin{bmatrix} 3 & -6 \\ 15 & 0 \end{bmatrix}

\begin{bmatrix} 3 & 2 \\ 5 & 0 \end{bmatrix}

Given matrices $A = \begin{bmatrix} 4 & -1 \\ 3 & 0 \end{bmatrix}$ and $B = \begin{bmatrix} -5 & 2 \\ 1 & 6 \end{bmatrix}$, find the result of $2A + B$.

\begin{bmatrix} 3 & 0 \\ 7 & 6 \end{bmatrix}

\begin{bmatrix} 13 & -4 \\ 5 & -6 \end{bmatrix}

\begin{bmatrix} 8 & -2 \\ 6 & 0 \end{bmatrix}

\begin{bmatrix} -1 & 1 \\ 4 & 6 \end{bmatrix}