Answer the following statements true (T) or false (F)

1. One drawback of sign-magnitude representation is that there are two representations of 0.
2. Both sign-magnitude representation and twos complement representation use the most significant bit as a sign bit.
3. It is not necessary for the ALU to signal when overflow occurs.
4. Overflow can only occur if there is a carry.
5. Compared with addition and subtraction, multiplication is a complex operation, whether performed in hardware of software.

1. True
2. True
3. False
4. False
5. True