Make sure to import NLTK in python and all of books. Answer the following questions along with Python code and its result.

1. Produce a dispersion plot of the four main protagonists in Sense and Sensibility: Elinor, Marianne, Edward, and Willoughby. What can you observe about the different roles played by the males and females in this novel? Can you identify the couples?

Hint: text2 is Sense and sensibility text given by NLTK use dispersion_plot() for your reference, NO need to include graph.

2. Define a variable my_sent to be a list of words, using the syntax my_sent = ["My", "sent"] (but with your own words, or a favorite saying).

a. Use ' '.join(my_sent) to convert this into a string.

b. Use split() to split the string back into the list form you had to start with.

3. The first sentence of text3 is provided to you in the variable sent3. The index of the in sent3 is 1, because sent3[1] gives us 'the'. What are the indexes of the two other occurrences of this word - the in sent3?

4. What is the difference between the following two lines? Which one will give a larger value? Will this be the case for other texts?

>>> sorted(set([w.lower() for w in text1]))

>>> sorted([w.lower() for w in set(text1)])