Add a methyl substituent at carbon \#3, and an ethyl substituent at carbon \#5 to this organic molecule. Be sure your answer is a skeletal ("line") structure that follows all the usual rules.

To get creative with your molecular structure, imagine starting with a basic framework of a carbon chain. For our needs, we'll take a straight chain of carbons as the base. Now, picture adding a methyl group (-CH₃) perched on the third carbon and an ethyl group (-C₂H₅) elegantly branching off the fifth carbon. In skeletal form, it looks something like this: ``` CH3 | C-C-C-C-C | CH2 | CH3 ``` Here, each vertex and line represents carbon atoms and their bonds, respectively, capturing the spirit of your substitutions! Just be sure to follow the traditional conventions of skeletal formulas when drawing it out!