4. Do the following conve rsiorn Perform the arithmetic operation value of "-15 - 35" in 8-bit signed binary system 5. 6. Suppose: y = (001 1 1 0 1 1 1 00 1 1 0 1 0 1 000 1 0 1 0 0000 0000); Is x bigger than y if using 32-bit unsigned binary system. Prove it. Is x bigger than y if using 32-bit signed binary system. Prove it and show your work. a. b