circular queue is implemented using a fixed array of size $4,$ indexed from $0.$ Show the contents of the queue by drawing, labelling clearly the location of the front and rear pointers of the circular queue, when:$($i$)[5$ marks$]$ The queue is empty. $($ii$)[10$ marks$]$Alcuin$,$ Derwent, Halifax, and James join the empty circular queue in thespecified order.$($iii$)[10$ marks$]$ Two entries are dequeued, and Vanbrugh enqueued to the resulting circularqueue in $($ii$).$