linearalgebra In Exercises \( 5-8 \), find the coordinate vector \( [\mathbf{x}]_{\mathcal{B}} \) of \( \mathbf{x} \) relative to the given basis \( \mathcal{B}=\left\{\mathbf{b}_{1}, \ldots, \mathbf{b}_{n}\right\} 2 answers