What is the number of moles of $$\mathrm{sp}^2$$ hybrid carbon atoms present in $$\mathrm{n}$$ moles of isopentane?

Which of the following compounds has the highest boiling point?

What is the number of moles of $$\mathrm{sp}^2$$ hybrid carbon atoms in one mole of hexa-1,4-diyne?

What is the number of moles of water molecules required to prepare n moles of methane from n moles of methyl magnesium iodide?