(a) Mr. Aiman has just opened a biscuit factory in Masjid Tanah, Melaka. With a limited budget, he is interested to equip his factory with a communication system so that any information from the main office can be delivered to his workers in the maintenance department. Furthermore, if there exist any sudden problems in the maintenance department, the workers can inform the main office as soon as possible. As a practical student, help Mr. Aiman choose the suitable configuration communication mode for his factory. Please provide a detail justification of your suggestion so that Mr. Aiman agrees and accepts your proposal. (5 marks) (b) A potential client requested you to design a telephone system that can send a minimum of 30 kbps of information. Determine the suitable bandwidth, signal power, and noise power to meet the customer's request. Justify why these values are selected. (4 marks)