array-based unbounded queue implementation.

Draw a memory map for the code you see on the next page, until the execution reaches the point indicated by the comment /* HERE */.In your diagram:• You must have a stack, heap, and static memory sections • Identify each frame as illustrated by the previous examples.• Draw your variables as they are encountered during program execution. Code: public class Passenger {private String name;private int ticketCost;private StringBuffer luggage;private static final int LUGGAGE_COST = 20;public Passenger(String name, int ticketCost) {this.name = name;this.ticketCost = ticketCost;luggage = new StringBuffer();}public Passenger addLuggage(String desc) {ticketCost += LUGGAGE_COST;luggage.append(desc);return this;}public int getTicketCost() {return ticketCost;}public Passenger reduceCost(int by) {ticketCost -= by;/* HERE */return this;}public String toString() {return "Passenger [name=" + name + ", ticketCost=" + ticketCost + ", luggage=" + luggage + "]";}}public class Driver {public static void…

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What are the main difference between stack and queue? How can each used in real world?