The major products from the following reaction sequence are product A and product B.

The total sum of $$\pi$$ electrons in product A and product B are __________ (nearest integer)

Consider the given reaction. The total number of oxygen atom/s present per molecule of the product $$(\mathrm{P})$$ is _________.

For the given reaction

The total number of possible products formed by tertiary carbocation of A is ____________.

The number of possible isomeric products formed when 3-chloro-1-butene reacts with $$\mathrm{HCl}$$ through carbocation formation is __________.