Find the inverse of the matrix
B = ( 2 0 − 2 0 0 1 0 0 0 3 1 5 0 0 0 1 ) . {\displaystyle B={\begin{pmatrix}2&0&-2&0\\0&1&0&0\\0&3&1&5\\0&0&0&1\end{pmatrix}}.}
