A hydrocarbon Y is found by combustion analysis to contain 87.17% carbon and 12.83% hydrogen by mass.

(a) Use the procedure in Problem 2.44(b) and (c) to determine the molecular formula of Y. (Remember that all alkanes and cycloalkanes must contain even numbers of hydrogens.)

(b) Draw the structure of an alkane (which may contain one or more rings) consistent with the analysis given in part (a) that has two tertiary carbons and all other carbons secondary. (More than one correct answer is possible.)

(c) Draw the structure of an alkane (which may contain one or more rings) consistent with the analysis given in part (a) that has no primary hydrogens, no tertiary carbon atoms, and one quaternary carbon atom. (More than one correct answer is possible.)