1. Given Hexadecimal A123₁₆
   1. What is the binary representation?
   2. Convert it to decimal number if this is an unsigned 16-bit integers binary representation.
   3. Convert it to decimal number if this is a 2s-complement signed binary representation in a 16-bit register
   4. What is the negation of A123 (result should be written HEX)?
   5. Extend A123 to 32-bit if it is a 2s-complement signed integer. Use both binary and hex to write the 32-bit representation.