Let G be a group of order 660 then which of the following statements is always true about G :
1
G has a normal Sylow 5 -subgroup.
2
The number of Sylow 11 -subgroups of G is 1 or 12.
3
G has at least one subgroup of order 110.
4
G is isomorphic to the cyclic group \(\mathbb{Z}_{660} \)