Exercise 1 1 point possible (graded) In Exercise 1, we will define the alphabet used in the cipher. The sample code imports the string library has been imported. Create a string called alphabet...

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Exercise 1 1 point possible (graded) In Exercise 1, we will define the alphabet used in the cipher. The sample code imports the string library has been imported. Create a string called alphabet consisting of the space character (' ') followed by (concatenated with) the lowercase letters. Note that we're only using the lowercase letters in this exercise. Sample code: import string # write your code here! What is the correct way to create the alphabet string using the string library? alphabet = string.ascii_lowercase alphabet = string.ascii_lowercase + " " alphabet = " " + string.ascii_letters alphabet = " " + string.ascii_lowercase alphabet = string.ascii_letters + " " unanswered SubmitYou have used 0 of 2 attemptsSome problems have options such as save, reset, hints, or show answer. These options follow the Submit button. SaveSave Your Answer Exercise 2 1 point possible (graded) In Exercise 2, we will define a dictionary that specifies the index of each character in alphabet. Note that alphabet is as defined in Exercise 1. Create a dictionary with keys consisting of the characters in alphabet and values consisting of the numbers from 0 to 26. Store this as positions. What is the value of the key n in the positions dictionary? unanswered SubmitYou have used 0 of 5 attemptsSome problems have options such as save, reset, hints, or show answer. These options follow the Submit button. SaveSave Your Answer Exercise 3 1 point possible (graded) In Exercise 3, we will encode a message with a Caesar cipher. Note that alphabet and positions are as defined in Exercises 1 and 2. Use positions to create an encoded message based on message where each character in message has been shifted forward by 1 position, as defined by positions. Note that you can ensure the result remains within 0-26 using result % 27. Store this as encoded_message. Use this code to get started: message = "hi my name is caesar" # write your code here! What is encoded_message? Do not include any quotes in your answer. unanswered SubmitYou have used 0 of 10 attemptsSome problems have options such as save, reset, hints, or show answer. These options follow the Submit button. SaveSave Your Answer Exercise 4 1 point possible (graded) In this Exercise 4, we will define a function that encodes a message with any given encryption key. Use alphabet, position, and message as defined in Exercises 1 through 3. Define a function encoding that takes a message as input as well as an int encryption key key to encode a message with the Caesar cipher by shifting each letter in message by key positions. Your function should return a string consisting of these encoded letters. Use encoding to encode message using key = 3 and save the result as encoded_message. Print encoded_message. What is the new encoded_message? Do not include quotes in your answer. unanswered SubmitYou have used 0 of 10 attemptsSome problems have options such as save, reset, hints, or show answer. These options follow the Submit button. SaveSave Your Answer Exercise 5 1 point possible (graded) In Exercise 5, we will decode an encoded message. Instructions Use encoding to decode encoded_message. Store your encoded message as decoded_message. Print decoded_message. Does this recover your original message? What key can be used to decode the message and recover the original message shifting backwards? 6) What is Project Gutenberg? An online repository of publically available books in many languages An online repository of electronically-scanned microfiche copies of the original works of Martin Luther An online translation service that can be used for any text file, including entire books 7)The function count_words is as defined in Video 3.2.2. Consider the following code: len(count_words("This comprehension check is to check for comprehension.")) What does this return? 5 6 7 8 8)The functions count_words and count_words_fastare as defined in Video 3.2.2. Consider the following code: count_words(text) is count_words_fast(text) What does this return? True False 9) Which of the two versions of Romeo and Juliet from Project Gutenberg contains more unique words, the original or the German translation? The original The German translation The two contain the same number of unique words 10)What type of object does os.listdir return? string int list tuple 11)What pandas method allows you to insert a row to a dataframe? insert ind row loc 12)How can you increase a numerical title_num value by 1? title_num ++ title_num += 1 title_num =+ 1 title_num + 1 13)How can you retrieve the first and last few rows of a pandas dataframe called stats? stats.first() and stats.last() stats.head() and stats.tail() stats.begin() and stats.end()