How many methylene groups are present in the above compound?

Parent chain of the above compound contains:

Identify the groups $\mathrm{X}$ and $\mathrm{Y}$ in the following cases:

The correct locant of the carbonyl group in the above compound is:

Word root of the above compound is 

In the IUPAC name of the above compound, the prefix + word root + primary suffix + secondary suffix will be: