5. Use the Web to find out how many countries are currently officially assigned a 3-digit ISO 3166 country codes. Which country has the highest numeric ID code number? How many bits are necessary to represent all assigned country ID numbers; why? [4] 6. Perform the following calculations and indicate the result accurately. [3] a. 1018 + 770s = b. 1067nex + ABC9 C. AB7Dmx-1111ne 7. Please read carefully. Using minimum number of digits in 2's complement notation, perform 10-7 (subtraction by preserving addition). Show all the significant steps in your work by indicating the starting values, sign conversion and the addition operation aligning all numbers including the carry values in each position using the Courier New font indicate the final value as decimal. [5] 8. Represent the decimal number 105.25 in scientific notation without a decimal point. [3] 9. Using 10-bit floating point notation having the format SEE EMMMMMM: (8) a. Decode to decimal integer and/or fraction): 0001110110 b. Decode to decimal integer and/or fraction): 1101100000 c. Encode: 3/32 d. Encode: +5 and 6/8 10. Using an ASCII Table, decode: [2] 546869732049732053696d706c6521 11. On average, a typical page of text holds roughly 2000 characters. Approximately how many pages of Unicode text can a storage media with 1 Gigabyte of free space hold? Show each step of unit conversions and calculation required. [4] Note: only an approximation is required - do not use a calculator to answer this