Well, honey, let me break it down for you. From 4pm to midnight is 8 hours, and then add another 1 hour to make it 9 hours total. So, 4pm to 1am is 9 hours. Math doesn't have to be complicated, darling.
12am to 4pm is 16 hours.
6 hours from 4pm to 10pm
7am to 4pm is 9 hours.
4pm to midnight is 8 hours.
10am to 4pm is a period of six hours.
19 hours
9 hours
6
17
56 hours
7 hours
Two hours