The Stem-аnd-Leаf plоt belоw represents the аges оf Presidents at their time of inauguration: 4 | 23 4 | 6677899 5 | 0011112244444 5 | 555566677778 6 | 0111244 6 | 589 7 | 0 How many of the presidents were aged 65 or older at the time of inauguration?