Answer all the following questions. (1) Answer the following questions on binary number representations. (a) Express the following decimal numbers in the 8-bit two's complement representation. (i) +80 (ii) 48 (b) Convert the following 8-bit two's complement binary numbers into the 8-bit sign-and-magnitude binary representation. (i) 10111000 (ii) 11000111 (c) Show the results of the following addition and subtraction in the 8-bit sign-and-magnitude binary number system. (i) 10111000+11000111 (ii) 1011100011000111 (d) Show the results of the following addition and subtraction in the 8-bit two's complement binary number system. (i) 10111000+11000111 (ii) 1011100011000111