Could someone help me on this problem?

I want to figure out which of the following groups is isomorphic to

. The following groups are

I know

has order 6, so the given group has order 48/6=8. I tried to list the elements of this factor group which has order 8, but I was unable to do so since I don't know how to pick the representatives from

so that they will give 5 distinct elements (I know

is the identity in this factor group). I know

is cyclic, so if I can show that the factor group has no element of order 8, then I can eliminate

. I also know every non-identity element of

has order 2, so if I can show that the factor group has an element of order 4, then I should be able to finish. Any help is appreciated.