Question: STACK AND QUEUE 1. Based on the Java statements below, answer ALL of the following questions: Stack st1= new Stack(); Stack st2 = new Stack();

STACK AND QUEUE

1. Based on the Java statements below, answer ALL of the following questions: Stack st1= new Stack(); Stack st2 = new Stack(); st1.push(20); st2.push(30); System.out.println(st2.pop()); st2.push(st1.peek()); st1.push(40); st1.push(50); st1.push(st2.pop()); System.out.println(st1.peek()); a. Show step-by-step the state of memory stack st1 and st2 while executing the Java statements. b. What is the output of the Java statements?

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