Are the following two assignments same ? Why / why not ?

1.    T1 = 3, 4, 5  
      T2 = ( 3, 4 , 5)    
   

2.

   T3 = (3, 4, 5)     
   T4 = (( 3, 4, 5))  

What would following statements print? Given that we have tuple= ('t', 'p', 'l')

1. print("tuple")
2. print(tuple("tuple"))
3. print(tuple)

How is a tuple containing just one element created ?

How can you add an extra element to a tuple ?