For the following compounds, write structural formulas and IUPAC names for all possible iso-mers having number of double or triple bonds are indicated:

For the following compounds, write structural formulas and IUPAC names for all possible iso-mers having number of double or triple bonds are indicated:
(a) ${{C}{4}}$${{H}{8}}$ (one double bond)
(b) CsHg (one triple bond).