1) What search and surveillance technologies are likely to be effective in preventing terrorist attacks AND provide an acceptable trade-off between security and privacy?

2) Calculate the range (minimum and maximum numbers which can be represented) and the precision (the smallest non-zero representable number) of an 8-bit xed point unsigned integer with the binary point located as shown: bbbbbb.bb, i.e. 6 bits to represent the integer part and 2 bits to represent the fractional part (each b represents a binary bit so it can be 0 or 1).

3) Calculate the following expressions while converting the rst argument to the number system of the second one and present the result in decimal number system: (a) 156 + 1515 (b) 1213 1212 (c) 1010 10100 (d) 712 127 Note: treat ab as number a presented in number system of base b.

4) Present the following decimal numbers in Gray code: 10, 15, 64