3. Given the two binary numbers (01010101)2 and (01001011)2, using signed magnitude arithmetic: i) add the two numbers and ii) subtract the second number from the first number. (be sure to show your work). 4. Express (118)10 and (-4910 in 8-bit binary one's complement form and then add the numbers. What would be the representation (-010 in 16-bit binary one's complement? (be sure to show your work)