(a) Count the elements of unsaturation in the three structures shown above (parsalmide, ethynyl estradiol, and dynemicin A).
(b) Draw structural formulas of at least two alkynes of each molecular formula.
(1) $\mathrm{C}_{6} \mathrm{H}_{10}$
(2) $\mathrm{C}_{8} \mathrm{H}_{12}$
(3) $\mathrm{C}_{7} \mathrm{H}_{8}$