Instructions for the Script File Define functions with the following names: process$\_$word$(),$ process$\_$line$(),$ process$\_$file$(),$ find$\_$unique$(),$ find$\_$frequency$(),$ most$\_$common$(),$ remove$\_$stop$(),$ count$\_$by$\_$length$(),$ and count$\_$by$\_$first$().$ Descriptions of each of these functions are provided below. process$\_$word$()$ This function should accept a single parameter named word. This parameter is expected to contain a string representing a word. The function should remove any punctuation from the string and convert it to lowercase. This can be done by performing the following steps. $1.$ Store the string $\text{'}.!?,"\backslash \text{'}()*\_$:;$0123456789\text{'}$ in a variable named remove. This string contains all of the characters to be removed from the beginning and end of word, if they are present. $2.$ Use the strip$()$ method for strings to remove punctuation and digits from the beginning and end of word. Pass the method the string remove. Store the stripped string in a variable. $3.$ Use the replace$()$method on the string created in Step $1$ to replace any single quote characters $($likely representing apostrophes$)$ with an empty string. That is$,$ replace occurrences of $"\text{'}"$ with $"".$ Store the result. $4.$ Use the lower$()$ method on the string created in Step $2$ to convert it to lower case. Store the result. The function should return the string created in Step $3.$ process$\_$line$()$ This function should accept a single parameter named line. This parameter is expected to contain a string rep