(a) Based on Figure 3 below, both station A and station C are trying to transmit to station B wirelessly. i) Elaborate on hidden terminal and fading problems. ;-) ii) What is the most suitable Medium Access Control (MAC) protocol for wireless connectivity like this? B B A's signal strength C's signal strengini Figure 3 Three nodes connected wirelessly isers (b) The Figure 4 below shows a simple 3G system architecture. Explain how 3G user access data and voice network using this architecture. [...] MSC X G Public telephone network Gateway MSC X radio network controller X SGSN Public Internet GGSN Figure 4