TASK marks$)$:

Using a for statement, write a Matlab program using a script file that compute the

sum of the first $n_{{?}_{?}}$ terms of the series equation stated below. Execute the script file for

$n=4$ and $n=20.$

${\displaystyle \underset{k=1}{\overset{n}{}}}\frac{(-1{)}^{k}k}{2^k}$

Answer $($show your MATLAB script editor and the output$)$: