Convert the following binary numbers to decimal:

a$.10100$

b$.11000$

Convert each decimal number to binary:

a$.24$

b$.38$

Add the binary numbers:

a$.101+111$

b$.111+100$

Determine the $2\text{'}$s complement of each binary number:

a$.00001011$

b$.01001101$

Convert each binary number to hexadecimal:

a$.10101$

b$.10110110$

Convert each hexadecimal number to binary:

a$.3E$

b$.12$ F

Convert each of the BCD numbers to decimal:

a$.10010111$

b$.001110001001$

Convert each decimal number to BCD:

a$.163$

b$.279$