Exercise 4. Consider the figure below. Suppose that video is encoded at a fixed bit rate, and thus each video block contains video frames that are to be played out over the same fixed amount of time. . The server transmits the first video block at to, the second block at t0 + , the third block at to + 2A, and so on. Once the client begins playout, each block should be played out time units after the previous block Constant bit rate video transmission by server Video reception at client Time Figure 2: Transmission and Reception over time (a) Suppose that the client begins playout as soon as the first block arrives at t1. In the figure above, how many blocks of video (including the first block) will have arrived at the client in time for their playout? HINT: Run a simulation on paper to check if a block is received before its playback time. If yes -> it arrived on time. If not-> it was missed and must be thrown away. (b) Suppose that the client begins playout now at ti +A. How many blocks of video (including the first block) will have arrived at the client in time for their playout? nber of blocks that is client buffer, awaiting playout? Seq Event Buffer HINT What are the events that are happening?1 Time advances to next playback step Block 1 received One block is received 2 Block 2 received Render 1 (d) What is the smallest playout delay at the client, such that every video block has arrived in time for its playout