(1) Tibo was headed to his car after a long, stressful day of classes. (2) He pulled his brand new set of keys out of his pocket and opened the door. (3) Suddenly, an ear piercing wail began to blare across the parking lot. (4) He had accidentally set off the anti-theft alarm. (5) Tibo groaned as he realized that he had no idea how to turn off the alarm. (6) Students walking by began to stop and stare at him. (7) He waved glumly at them. (8) A police car pulled up next to him, and a tired looking officer stepped out (9) Tibo couldn't wait for the day to be over. Which sentence contains a word or phrase that needs to be hyphenated? O sentence 1 O sentence 6 O sentence 2 O sentence 9​