Provide the $IUPAC$ name for the given compound.

What is the $IUPAC$ name of the following compound?

The $IUPAC$ name of succinic acid is

Structures and $IUPAC$ names of some hydrocarbons are given below. Explain why the names given in the parentheses are incorrect.
$(a)$ $CH_3-CH(CH_3)-CH_2-CH_2-CH(CH_3)-CH(CH_3)-CH_2-CH_3$
Name: $2,5,6-$Trimethyloctane [and not $3,4,7-$Trimethyloctane]
$(b)$ $CH_3-CH_2-CH(CH_2CH_3)-CH_2-CH(CH_3)-CH_2-CH_3$
Name: $3-$Ethyl$-5-$methylheptane [and not $5-$Ethyl$-3-$methylheptane]

The $IUPAC$ name of the following structure is $CH_3-C(=O)-CH_2-COOH$.

The correct structure of $4-bromo-3-methylbut-1-ene$ is