Matrices & Systems · Medium problem

A workshop uses $A = \begin{pmatrix}1 & 2\\3 & 5\end{pmatrix}$ raw-material units per batch of two products. It has two upcoming weekly demand targets: week $1$ needs outputs $\begin{pmatrix}4\\11\end{pmatrix}$ and week $2$ needs outputs $\begin{pmatrix}1\\2\end{pmatrix}$ (in the same two raw materials). Adding up the batch counts for BOTH products over BOTH weeks, how many batches in total does the workshop need to run?