Several exercises in my textbook start with assumptions that confuse me. For example: Assume 185 and 122 are signed 8-bit decimal integers stored in sign-magnitude format. Assume 151 and 214 are signed 8-bit decimal integers stored in two's complement format. I am then to go on to find the sum or difference (varies by exercise) of the numbers and state if there is overflow, underflow, or neither. But...isn't the maximum number that can be represented here 2^7−1=127?