What is the correct $IUPAC$ name of the following structure?

Expand each of the following condensed formulas into their complete structural formulas.
$(a)$ $CH_3-CH_2-CO-CH_2-CH_3$
$(b)$ $CH_3-CH=CH-CH_2-CH_2-CH_2-CH_3$

The $IUPAC$ name of $CH_3-CH(CH_3)-CH_2-COBr$ is

What is the $IUPAC$ name of $CH_3-CH_2-CH=C(CH_3)CH_2OH$?

Name the following compounds according to the $IUPAC$ system:
$(i)$ $CH_3-CH(CH_2Cl)-CH(CH_2OH)-CH(CH_3)-CH_3$
$(ii)$ $CH_3-CH(CH_3)-CH_2-CH(OH)-CH(CH_2OH)-CH_3$
$(iii)$ $3-$Bromocyclohexanol (structure implied)
$(iv)$ $H_2C=CH-CH(OH)-CH_2-CH_2-CH_3$
$(v)$ $CH_3-C(CH_3)=C(Br)-CH_2OH$

The $IUPAC$ name of neopentane is :-