Question: suppose you have ql as integer queue with the following data (1,2,3,4,5,6], where lis at the front of the queue and ql is passed to

 suppose you have ql as integer queue with the following data

suppose you have ql as integer queue with the following data (1,2,3,4,5,6], where lis at the front of the queue and ql is passed to a recursive method f1 (), what the output of executing f1()? void fl( Lqueue q1 ) { System.out.print (q1.dequeue(); if (!ql.isEmpty()) fi( q1); ) Select one: a. 1,2,3,4,5,6 O b. 6,5,4,3,2,1 c. method fl() is not executable Od. 1,6,2,5,3,4 The time complexity of the remove Back) operation of the double ended queue implemented

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