1. Convert 23 from decimal (base 10) to binary (base 2). 2. Convert 10111111 from binary to hexadecimal (base 16). 3. Convert 5.375 from decimal into binary. 4. Convert 797 from decimal into base 7. 5. Give the 2's complement of the decimal 7 using 4 bits (binary digits). 6. Give the 2's complement of the decimal -7 using 4 bits. 7. Represent 7 in excess 4 using 4 bits. 8. Convert the 2's complement 4 bit number (1101) into decimal.