Make the following modifications to the original sentence-generator program:

a The prepositional phrase is optional. (It can appear with a certain probability.)

b A conjunction and a second independent clause are optional: The boy took a drink and the girl played baseball.

c An adjective is optional: the girl kicked the red ball with a sore foot.

You should add new variables for the sets of adjectives and conjunctions.

Program: generator.py Author: Ken Generates and displays sentences using simple grammar and vocabulary. Words are chosen at random. import random articles = ("A", "THE") nouns = ("BOY", "GIRL", "BAT", "BALL") verbs = ("HIT", "SAW", "LIKED") prepositions = ( "WITH", "BY") def sentence(): " "Builds and returns a sentence.""" return nounPhrase(0 + " " + verbPhrase() def nounPhrase(): "" "Builds and returns a noun phrase."" return random.choice (articles) + " " + random.choice ( nouns) def verbPhrase(): "" "Builds and returns a verb phrase.""" return random.choice ( verbs) + " " + nounPhrase(0 + " " + \ prepositionalPhrase() def prepositionalPhrase): """Builds and returns a prepositional phrase.""" return random . choice (prepositions) + " " + nounphrase) def main (0) : ** "Allows the user to input the number of sentences to generate."" number = int ( input ( "Enter the number of sentences: ")) for count in range(number): print ( sentence(0) main()