Write a function called countWords() that takes a filename (string) as an argument and returns the total number of words in the text of that file.

Write a function called countSentences() that takes a filename (string) as an argument and returns the number of sentences in the text of that file.

Write a function called removePunctuation() that takes a string of text as an argument and returns that same text with all of the punctuation characters removed from it.

Write a function called wordFrequency() that takes a filename(string) as an argument and returns a dictionary containing each unique word along with the number of times that word occurred in the text.

code in python3 pls