4. A packet voice communications system transmits digitized speech only during "talkspurts" when the speaker is talking. In every 10-ms interval (referred to as a timeslot) the system decides whether the speaker is talking or silent. When the speaker is talking, a speech packet is generated; otherwise no packet is generated. If the speaker is silent in a slot, then the speaker is talking in the next slot with probability p = 1/140. If the speaker is talking in a slot, the speaker is silent in the next slot with probability q = 1/100. If states 0 and 1 represent silent and talking, sketch the Markov chain for this packet voice system. Find the limiting state probabilities.