Convert a number in a number system to another one. Write down the intermediate steps of

your calculations.

$1.$ Decimal numbers to binary numbers. $(10$ pts$)$

a$.157$

b$.39\mathrm{.}25$

$2.$ Binary numbers to decimal numbers. $(10$ pts$)$

a$.(10111010)2$

b$.(1101\mathrm{.}011)2$