Solution-1:
Its a scientific fact that sun rises everyday .
Hence probability is 1
Solution-2
Probability is 1
Solution:-3
We don't know that Ana will score perfect or imperfect
Hence probability is 1/2
Solution-4
A coin has two faces head and tail.
Hence probability of coming head is 1/2.
Solution-5:-
Its impossible to drink 1litre of water in 5s.
Hence probability is 0.