[2.5pts] Write the function common(listl, list2) that takes two lists, listl and list2, and returns (not prints) a new list containing only the elements that are common between the two lists in descending order (without duplicates). Make sure your code works on lists of different sizes. Your code should not mutate the given lists. Hint: reverse sorting could be useful here [2.5pts] Write the function connect(list1, list2, k) that takes two lists, listl and list2, and a non- negative integer k that is less than or equal to the length of list1. It returns (not prints) a new list containing the first k elements of list1, then all elements of list2, then the remaining elements of list1. Hint: slicing could be helpful here [5pts] Write the function countWords(document), where document is the name of a txt file that contains multiple strings. This function returns (not prints) a dictionary whose keys are included words (in lowercase), and values their word counts. You can assume the string doesn't have any contraction words such as cant, dont, isnt, etc. The starter code already contains the code to read the txt file, just make sure the file is in the same directory as your .py file. Hint: Remove punctuation and numbers before counting the words