# What are all the stereoisomers of 1-ethyl-3-methylcyclohexane?

What are all the stereoisomers of 1-ethyl-3-methylcyclohexane? The following image shows my attempt to answer the question. But I am not sure if I am correct.

Note: I am treating this cyclohexane as flat since it's confomers interconvert rapidly.

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Strictly there are eight missing hydrogens per structure that you should add for clarification: three for each methyl- and five for each ethyl-group. C or C$_2$ is not a common (and as for C$_2$ not a good*) abbreviation for such groups ... Me and Et or CH$_3$ and C$_2$H$_5$ would be more usual.
* e.g., C$_2$ could be $\ce{-C#CH}$ or $\ce{-CH=CH2}$