Answer :
Now: 1
12 hours from now: 2
24 hours from now: 4
36 hours from now: 8
48 hours from now: 16
60 hours from now: 32
72 hours from now: 64
12 hours from now: 2
24 hours from now: 4
36 hours from now: 8
48 hours from now: 16
60 hours from now: 32
72 hours from now: 64