2 The matrices \(\mathbf { A } , \mathbf { B }\) and \(\mathbf { C }\) are given by \(\mathbf { A } = \left( \begin{array} { l l } 1 & - 4 \end{array} \right) , \mathbf { B } = \binom { 5 } { 3 }\) and \(\mathbf { C } = \left( \begin{array} { r r } 3 & 0
- 2 & 2 \end{array} \right)\). Find
- \(\mathbf { A B }\),
- \(\mathbf { B A } - 4 \mathbf { C }\).