Organic Chemist...

Which of the following is correct IUPAC name of compound?

The name of the following compound is :
$${ CH }_{ 3 }{ CH }_{ 2 }({ CH }_{ 3 }){ CHNH }_{ 2 }$$

The correct IUPAC name of the alkyl group,
$$ { CH }_{ 3 }-\overset { \overset { { C }_{ 2 }H_{ 5 } }{ | }  }{ CH } -{ CH }_{ 2 }-{ \overset { \overset { { C }_{ 2 }{ H }_{ 5 } }{ | }  }{ CH-C } H }_{ 3}$$

IUPAC name of the compound 
$$BrCH_2-CHCl-CHCl_2$$ is 

IUPAC nomenclature of 

The IUPAC name of $${\text{C}}{{\text{H}}_{\text{3}}} - {\text{CH}}\,{\text{ = }}\,{\text{CH}}\, - {\text{C}} \equiv \,{\text{CH}}$$ is :

IUPAC name of $$ CH_3-C \equiv C-HC-(CH_3)_2 $$

What is the IUPAC name of the given compound
$$ { CH }_{ 3 }-\underset { \underset { OH }{ | }  }{ CH } -{ CH }_{ 2 }-{ CH }_{ 2 }-{ CH }_{ 2 }-\overset { \underset { | }{ Br }  }{ \underset { \overset { | }{ Br }  }{ C }  } -{ CH }_{ 3 } $$

The IUPAc name of 

The correct name of $$H_3C-CH_2-C\equiv C-CH=CH_2$$ is