(b) (15 pts.) ALOHA. Assume for simplicity that each transmitted packet in a slotted Aloha system is successful with some fixed probability p. New packets are assumed to arrive at the beginning of a slot and are transmitted immediately. If a packet is unsuccessful, it is retransmitted with probability qrin each successive slot until successfully received. Find the expected delay T from the arrival of the packet until the completion of its successful transmission.