Which of the following statement is/ are true?
1
The set of all functions f : [0, 1] → ℤ is countable.
2
The set of all functions f : (0, 1) → ℤ is uncountable.
3
The set of all function f: [0,1] → ℚ is countable.
4
The set of all functions f : (0, 1) → ℚ is countable.