2) Draw the most stable conformation for each of the following: a) 2,3-dimethylbutane (use wedges and dashes to show 3-D). b) cis- and trans- 1,2-dibromocyclohexane (use chairs to show 3-D, clearly showing the equatorial and axial substituents on carbons 1 and 2). (Try cis- and trans- 1,3-dibromocyclohexane and cis- and trans-1,4-dibromocyclohexane on your own time; see how they differ) c) 1,4-dibromo-2-methylcyclohexane; the two bromines cis- to each other and trans-to the methyl group (use a chair to show 3-D, again clearly showing relevant equatorial and axial substi hiontsl