You have a device that wants to transmit many packets to a router, which is sometimes busy serving other users. At every second, your device attempts to send a packet. It succeeds with probability 1/5 and the attempt outcomes are independent of one another. LetXdenote the number of successful attemptsout of 5(this is different than above). Assume that you observe eventA, which is{X2}. What isE[X|A]?