$\mathrm{.}3\mathrm{.}1\mathrm{.}1.$ Activity $1\mathrm{.}1-$ Generating numpy array Data

Creating matrices with certain patterns is a useful activity in data science. Use the numpy to generate these matrices.

Create a matrix A of size n x m$,$ where all entries are random. $\backslash$

Create a square matrix B of size n$,$ where all entries are random and matrix is symmetric $($that is A$[$i$][$j$]=$ A$[$j$][$i$])\backslash$

Create a square matrix C of size n$,$ where all entries are random and matrix is tri$-$diagona