i didn't understood example no 10 2 pg no 285 plz xplain me as soon as possible - Chemistry - Haloalkanes and Haloarenes

Question

i didn't understood example no 10 2 pg no 285 plz xplain me as
soon as possible

Urvashi Yadav · Accepted Answer

Example: 10 2

In this structure, on C-2, double bond and at C-4, bromo group is present So, its IUPAC name - 4-Bromopent-2-ene

In this structure, at C-1, double bond and C-3 bromo group is present, so its IUPAC name - 3-Bromo-2-methylbut-1-ene

In this structure, at C-2 double bond and at C-4 bromo group is present, so its IUPAC name is - 4-Bromo-3-methylpent-2-ene Similarly, try to solve other examples given

i didn't understood example no. 10.2 pg no. 285. plz xplain me as soon as possible