OPIMCIL. EX 3.4 Hand trace an initially empty stack x throu operations: lly empty stack x through the following X.push(new Integer (4)); x.push(new Integer (3)); Integer Y = X.pop(); x.push(new Integer (7)); X.push(new Integer (2)); X.push(new Integer (5)); X.push(new Integer (9)); Integer Y = X.pop(); X.push(new Integer (3)); X.push(new Integer (9)); Given the resulting stack x from the previous exercise, what Given would be the result of each of the following? EX 3.5 Y = X. peek(); Y = X.pop(); Z = X.peek(); CHAPTER 3 Introduction to Collections - Stacks c. Y = X.pop(); Z = X.peek ()