3 The matrices \(\mathbf { A }\) and \(\mathbf { B }\) are given by $$\mathbf { A } = \left[ \begin{array} { l l } 3 & 1
0 & 5 \end{array} \right] \quad \mathbf { B } = \left[ \begin{array} { l l } 0 & 4
7 & 1 \end{array} \right]$$ \section*{Calculate AB} Circle your answer.
[0pt] [1 mark] $$\left[ \begin{array} { l l } 3 & 5
7 & 6 \end{array} \right] \quad \left[ \begin{array} { c c } 0 & 20
21 & 12 \end{array} \right] \quad \left[ \begin{array} { l l } 0 & 4
0 & 5 \end{array} \right] \quad \left[ \begin{array} { c c } 7 & 13
35 & 5 \end{array} \right]$$