What is the output of the following code?

t = (10, 20, 30, 40, 50, 60, 70)  
print(t[5:-1])

1. Blank output( )
2. (10, 20, 30, 40, 50)
3. (10, 30, 50, 70)
4. (10, 20, 30, 40, 50, 60, 70)

Which of the below given functions cannot be used with nested tuples ?

1. index( )
2. count( )
3. max( )
4. sum( )