Q5) (25 Marks): Give the reason behind: 1- In network using NAT, the communication must be started from the internal network. 2- In CSMA, collision may occur even with sensing network before using it. 3- In wireless LAN, a repetition interval is designed to cover PCF and DCF. 4- ATM transfers information in fixed-size cells consists of 53 octets, or bytes. 5- For a five slot baseband Bluetooth frame, frame length is 2866 bits