Please complete the compute$\_$cost$\_$reg function below to calculate the following term for each element in $w$

$\frac{}{2m}{\displaystyle \underset{j=0}{\overset{n-1}{}}}{w}_j^2$

The starter code then adds this to the cost without regularization $($which you computed above in compute$\_$cost $)$ to calculate the cost with regulatization.

If you get stuck, you can check out the hints presented after the cell below to help you with the implementation.