Answer all the questions. Answers should be written by hand and submitted on A4 sheets

1. (5 Marks) Search the World Wide Web and write about the following:
   • The world's first CPU
   • Speeds of SATA and SCSI Hard drives, CDs, DVDs and Pendrives.
     Order them in descending order according to their speeds and compare the speeds with that of a modern CPU such as i3, i5 or i7.
2. (10 Marks) Do the following problems related to binary numbers.
   • Convert 207 into 8-bit unsigned binary number
   • What does the following 6-bit signed binary number represent: 1100101?
   • Convert and add 107 and 129 in binary format.
   • Subtract 78 from 128 in binary using 8-bit signed numbers.
   • Multiply 37 with 10 in binary.
3. (5 Marks) Search the World Wide Web and write about USB.