27. The transmission schedule (shown below) for a given flow lists for each second the number of packets sent between that time and the following second. The flow must stay within the bounds of a token bucket filter. What bucket depth does the flow need for the following token rates? Assume the bucket is initially full. (a) 2 packets per second (b) 4 packets per second 28. Suppose a router has accepted flows with the TSpecs shown in the table below, described in terms of token bucket filters with token rate r packets per second and bucket depth B packets. All flows are in the same direction, and the router can forward one packet every 0.1 second. (a) What is the maximum delay a packet might face? (b) What is the minimum number of packets from the third flow that the router would send over 2.0 seconds, assuming the flow sent packets at its maximum rate uniformly