Code Challenge: Functions

$(1)$

Define a function process$\_$string$($s$)$ with the following characteristics:

It accepts a string s as a parameter

I returns a list with the following characteristics:

The string $s$ is split into a list of words $($we define words as sequences of alphanumeric characters separated by white spaces$).$

All of the words in the list are in lower case

When testing functions, you may add diagnostic code to your Python file and examine the output using the Run button. For example, you may wish to add a line like print$($process$\_$string$("$This is my test String"$))$ which should return a list $[\text{'}$this$\text{'},\text{'}$is$\text{'},\text{'}$my$\text{'},$ 'test', 'string'$].$

However, the Mark button will test your function with random sentences $($with meaningless "words"$).$ This ensures the function works as desired.