For the given compounds write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated:
`C_5H_8` (bond triple bond)

Explanation

`C_(5)H_(6): (i) Hoverset(1)(C)-= overset(2)(C) - overset(3)(C)H_(2) - overset(4)(C)H_(2) - overset(5)CH_(3)` Pent-1-yne
(ii) `overset(1)(C)H_(3) - overset(2)(C) -= overset(3)(C) - overset(4)(C)H_(2) - overset(5)(C)H_(3)` Pent-2-yne
(iii) `Hoverset(1)(C) -= overset(2)(C) - underset(underset(CH_(3))(|))overset(3)CH - overset(4)(C)H_(3)` 3-methylbut-1-yne