Please explain in steps how the code works and what will be printed by three commands below after the code

Given the following iterator pseudo-code for a doubly linked list below, what will be printed by the following code snippets? Iterator: Global space (instance variables): Node current //initialized to tail next() { if current is null: error current = current.previous if current is null: return head.value return current.next.value } hasNext()! return (current is not null) } General Information: //list contains (2,1,4,3), where 7 is at the head and 3 at the tail What will be printed by: print(itr.hasNext()) print (itr.next()) //for multiple prints, assume space separated while(itr.hasNext()): print (itr.next())