Two's Complement and Overflow 1. Under two's complement representation, how many bits will it take to represent the number 131? How about -128? Show that in a 4-bit binary architecture using 2's complement representation, the following operations provide the correct result: middot Positive plus Positive: 3 + 4 middot Negative plus positive: -1 + 4 middot Negative plus Negative: -2 + (-2) 3. Show that in a 4-bit binary architecture using 2's complement representation, the following operations DO NOT provide the correct result: middot Positive plus Positive: 5 + 5 middot Negative plus Negative: -4 + (-6) 4. But wait! In both of the previous questions (parts 2, 3), there were instances in which a carry bit was dropped. Explain why the arithmetic operations in 2 work but not in those in 3