Please type it do not handwritten

8. (16 points] Computer number system uses 2's complement to represent signed numbers. Answer the following questions: A. [4 points] Indicate if the following numbers are positive or negative. i. 10001000 ii. 1001000 iii. 01010101 iv. 11010101 B. [4 points] Convert the following numbers to decimal assuming that they are unsigned numbers: i. 10001000 II ii. 01110110 C. [4 points] Convert the same numbers to decimal assuming that they are signed numbers: i. 10001000 ii. 01110110