a. A social media site uses a 32-bit unsigned binary iv. representation to store the maximum number of people that can be in a group. The minimum number of people that can be in a group is 0. i. Explain why an unsigned binary representation, rather than a 32-bit signed binary representation, was chosen in this instance. ii. Write an expression using a power of 2 to indicate the largest number of people that can belong to a group. iii. Name and explain the problem that might occur if a new member tries to join when there are already 4,294,967,295 people in the group. On a particular day, you can get 0.72 pounds for 1 dollar at a bank. This value is stored in the bank's computer as 0.101110002. Convert 0.101 110002 to a decimal number, showing each step of your working. A clerk at the bank accidently changes this representation to 0.101110012. Convert this new value to a decimal number, again showing your working. Write down the binary number from parts i. and ii. that is closest to the decimal value 0.72. Explain how you know. A customer wants to change $100,000 to pounds. How much more money will they receive (to the nearest penny) if the decimal value corresponding to 0.101110012 is used, rather than the decimal value corresponding to 0.101110002