A. Binary and Hexadecimal number systems: [24 points] Visit the following videos, from the Khan Academy website; Binary number system http://www.youtube.com/watch?v=ry1 hpm1GXVI Hexadecimal number system http://www.youtube.com/watch?v=4EJay-6Bioo 1) Convert these binary numbers into decimal assuming they are unsigned integers. Shov your calculations. a. 01010011 b. 10100111 c. 10111010 2) Convert these binary numbers into decimal assuming they are using signed magnitude representation. Show your calculations. a. 01010011 b. 10100111 c. 10111010 3) Convert the decimal number 127 into binary number. 4) Then, convert the number 127 from binary to hexadecimal. B. History of computing devices: [17 points] (a) In one to two short sentences, based on the course readings, explain the differences between hardware and software