P$7\mathrm{.}10.$ Find the result $($in BCD format$)$ of adding the BCD numbers:

a$.*10010011\mathrm{.}0101$ and $00110111\mathrm{.}0001$ ;

b$.01011000\mathrm{.}1000$ and $10001001\mathrm{.}1001.$

P$7\mathrm{.}11.$ Express the following decimal numbers in binary, octal, and hexadecimal forms: