The queue has a corresponding scheduler level M, where {TAIL ~ M} is {HEAD ~ a positive integer} less than or equal to N 
The queue has a corresponding scheduler level M , where { TAIL ~ M } is { HEAD ~ a positive integer } less than or equal to N
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH