Chapter 11, Problem 32P

What compound of molecular formula ${\text{C}}_{\text{6}}{\text{H}}_{\text{10}}$ gives $\text{2,3-dimethylbutane}$ on catalytic hydrogenation over platinum?

What two compounds of molecular formula ${\text{C}}_{\text{11}}{\text{H}}_{\text{20}}$ give $\text{2,2,6,6-tetramethylheptane}$ on catalytic hydrogenation over platinum?