What is the correct `IUPAC` name of

What if the correct IUPAC name of the following compound ?

What is the correct IUPAC name for CH_3-underset(C_2H_5)underset(|)"CH"-CH_2-Br ?

What is the correct IUPAC name for CH_3-underset(C_2H_5)underset(|)"CH"-CH_2-Br ?

What is the correct IUPAC name for the following compound? CH_(3)(CH_(2))_(4)underset(|CH_(3))CH-underset(CH_(2)-CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(2)CH_(2)CH_(3)

The correct IUPAC name of is

The correct IUPAC name is