/*
* I attest that the code in this file is entirely my own except for the starter
* code provided with the assignment and the following exceptions:
* <Enter all external resources and collaborations here.>
*
* Note external code may reduce your score but appropriate citation is required
* to avoid academic integrity violations. Please see the Course Syllabus as
* well as the university code of academic integrity:
*
* Signed,
* Author: YOUR NAME HERE
* Penn email: <YOUR-EMAIL-HERE@
* Date: YYYY-MM-DD
*/

import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Scanner;
import java.util.Set;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Analyzer {

/*
* Implement this method in Part 1
*/
public static List<Sentence> readFile(String filename) {
   List<Sentence> sentences = new ArrayList<>();
   Pattern pattern
            = Pattern.compile("^(?<score>[+-]?[0-2])\\s(?<text>.*)$");

   // open a stream each item is a line of input file
   try (Stream<String> stream = Files.lines(Paths.get(filename))) {
         // filter all line which match the pattern
         sentences = stream.filter(pattern.asPredicate())
               .map(line
                        // split line to get score and text
                        // create sentnece object

1. Prepare a cheque for someone eating lunch in a restaurant. If th...