Consider a 3 x 3 voq switch that we studied in class. here, there are three input queues at each port, which hold packets bound for the three output ports (a total of nine queues). for example, q13 is the length of the queue (in packets) at input port 1, which are destined for output port 3. suppose that we denote a matching using the notation in which [13 22 31] indi cates that one packet each from the queues q13, q22 and q31 are sent to the output ports 3, 2 and 1 respectively.

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?