Answer
The first two structures are $cis-1,2-dimethylcyclopentane$. The next two structures are $trans-1,2-dimethylcyclopentane$. The last structure is $cis-1,3-dimethylcyclopentane$.
Work Step by Step
The first two structures are $cis-1,2-dimethylcyclopentane$. The next two structures are $trans-1,2-dimethylcyclopentane$. The last structure is $cis-1,3-dimethylcyclopentane$.
