Figure 7.17 illustrates how a token bucket is operated. Assume that r = 1 unit/s, p = 4 units/s, b = 20 units and no packet arrivals for the first 15 seconds. Then, suppose that 4 packets arrive right...

Figure 7.17 illustrates how a token bucket is operated. Assume that r = 1 unit/s, p = 4 units/s, b = 20 units and no packet arrivals for the first 15 seconds. Then, suppose that 4 packets arrive right at the 15 th second, with length equal to 2, 10, and 4 units, respectively. Take the assumption described above and calculate the releasing time of the 4 packets.