Define a variable $B$ and assign the following matrix to it:

$B$:$=\left[\begin{array}{cc}8& 2\\ -1& 0\\ 3& 2\\ 6& 5\\ 9& -2\end{array}\right].$

Create a variable b$1$ and set its value to the first column of B $($use colon indexing $-$ don't

just copy and paste the values!$).$ Print the output $($by omitting the semicolon at the

end of the line$).$

Find the size of $b1$ using the appropriate Matlab function. Print the output.

Add b$1$ to the second column of B$.$ Print the result.

Multiply the third row of B by $5$ and assign the resulting value to the third row of $B.$

Print the result.

Define a new variable $C$ that contains the second and third rows of $B($use colon indexing$).$

Print the result.