Which one of the following is the correct sequence of formation of the Commissions starting from the earliest?

Two unequal pairs of numbers satisfy the following conditions:

$\left(\mathrm{i}\right)$ The product of the two numbers in each pair is$2160.$

$\left(\mathrm{ii}\right)$ The HCF of the two numbers in each pair is $12.$

If $x$ is the mean of the numbers in the first pair and $y$ is the mean of the numbers in the second pair, then what is the mean of $x$ and $y$?

Which one of the following is the largest number among ${2222}^2, {222}^{22}, {22}^{222}, 2^{2222} ?$