Draw $cis$ and $trans$ isomers of the following compounds. Also write their $IUPAC$ names:
$(i)$ $CHCl=CHCl$
$(ii)$ $C_{2}H_{5}C(CH_{3})=C(CH_{3})C_{2}H_{5}$

(N/A) $(i)$ $CHCl=CHCl$:
$cis-1,2-Dichloroethene$: Both $Cl$ atoms are on the same side of the double bond.
$trans-1,2-Dichloroethene$: Both $Cl$ atoms are on opposite sides of the double bond.
$(ii)$ $C_{2}H_{5}C(CH_{3})=C(CH_{3})C_{2}H_{5}$:
$cis-3,4-Dimethylhex-3-ene$: Both $C_{2}H_{5}$ groups are on the same side of the double bond.
$trans-3,4-Dimethylhex-3-ene$: Both $C_{2}H_{5}$ groups are on opposite sides of the double bond.