1. 12 people (4 doctors and 12 nurses)
2. 17 patients (cause 6 patients didn't show up)
3. 102 calls (Molly answered 57, so total is 45+57=102)
4. 12 calls (there are 3 people made 36 calls in total)
5. 23 appointments (cause there are 36 calls but 13 of the patients decided to cancel their appointments)