Give `IUPAC` names for the following using `E` and `Z` designations.
`a.` , `b.`
`c.` , `d.`

Explanation

`a.`
Two higher priority groups on the opposite sides.
`1E,1-`Bromo`-1-`chloro`-`pent`-1-`ene
`b.`
Two higher priority groups on the opposite side.
`1E,2-`Bromo `-1-`chloro`-1-`iodo`-`but`-1-`ene
`c.` Tow higher priority groups on the same side
`2Z,3,5-`Dimethyl he `-2-`ene
`d.`
Two higher priority groups on the same side.
`1Z,1-`Chloro`-1-`iodo`-2-`methylbut `-1-`ene