Goal: Learn how to use typecasting.

Assignment: Given two variables $n$ and $m$ and two weights $w_n$ and $w_m,$ the weighted average

between $n$ and $m$ is given by:

$\frac{n*w_n+m*w_m}{w_n+w_m}$

Assuming the int variables n$,$ m$,$ wn$,$ wm have been defined and initialized, and that the double

variable weightedAverage has been declared, write a statement that assigns to weightedAverage

the weighted average between n and m $.$