Do the counting in Binary number system... from $0$ to $10011.$ and map the numbers in binary to decimal number system.

$2$: convert binary number $1011110$ to decimal number.

$101010$ in bin. $=?$ in dec.

$(1010101{)}_2=(?)10$

$(10111{)}_2=(?{)}_{10}$

$6\mathrm{.}45\mathrm{.}75$ in dec $=(?)$ in bin.

$7\mathrm{.}25\mathrm{.}5$ in dec $=(?)$ in bin.