a. (i) Under the wireless application landscape, CR(10) discuss ZigBee and GPRS which serves as a packet oriented mobile data standard on the 2G and 3G cellular communication network's global system for mobile communications. (ii) Indicate which of the two above that can be used for short range-low data rate and long range high data rate. b. In an attempt to have a reliable and controlled data, CR(10) My = 10000 n2 = 1000000 are the bits, data block. Probability of a single error has been given to be 10-6 Calculate the probability of packet of the two data block. Comment on the two answers relating to packet based communication E(5) c. With the aid of a simple waveform diagram explain sampling and quantization in communication system and state why we need them. [Total:25 Marks]