Following is a planar hexagon representation for one isomer of 1,2,4-trimethylcyclohexane. (a) Select the alternative chair conformations of this compound. (Select all that apply.) (b) Select which of the two is more stable. Write the IUPAC name for the compound below. Be sure to use correct punctuation. Keep the information page open for guidance and for use with feedback. Accepted names for branched alkyl groups are isopropyl, isobutyl, sec-butyl, and tertbutyl. Do not use italics. The IUPAC name is 1 more group attempt remaining - All hydrogen atoms are implied. - Show stereochemistry only if given in the name. - If a group is achiral, do not use wedged or hashed bonds on it. - In cases where there is more than one answer, just draw one. (a) Draw the structural formula for 3,3-dimethylhexane. (b) Draw the structural formula for cis-1,3-dimethylcyclopentane