same compound or isomer or different etc

For each of the following compounds, identify them as 1) the same or 2)
constitutional isomers or 3) geometric isomers or 4) enantiomers or 5)
different compounds that are not isomers

O CH3

O

C-C-C-C-C-O-C
C-C-C-O-C-C



C
C


O (Should be dbl bond also)

O (double bond)

C-C-C-N-C
C-N-C C




H (bonded to N)
C C


CH3

C-C-C-C-NHCH3 C-C-C-C


NH2

CH3