Problem $3$: Function

Write a MATLAB function called 'power$\_$series' that approximates the value of $e^x$ using its Maclaurin series expansion:

$e^x$~~$1+x+\frac{x^2}{2!}+\frac{x^3}{3!}+$dots

The function should take two input arguments: the value of $x$ and the number of terms $n$ to include in the approximation. The function should return the approximation of $e^x$ using the first $n$ terms of the Maclaurin series.