Draw a condensed structure for each of the following:
a. 2-hexyne,
b. 5-ethyl-3-octyne,
c. methylacetylene,
d. vinylacetylene,
e. methoxyethyne,
f. sec-butyl-tert-butylacetylene,
g. 1-bromo-1-pentyne,
h. 5-methyl-2-cyclohexenol,
i. diethylacetylene,
j. di-tert-butylacetylene,
k. cyclopentylacetylene,
l. 5,6-dimethyl-2-heptyne