Which names are local, which are global and which are built-in in following code fragment? invaders = Big names

Q. Which names are local, which are global and which are built-in in the following code fragment?

invaders = 'Big names'

pos = 200

level = 1

def play():

    max_level = level + 10

    print(len (invaders ) == 0)

    return max_level

res = play()

print (res)

Answer :-

Global names :- invaders, pos, level, res

Local names :- max_level

Built in :- len