This question concerns the stacks. Show what is written by the following segments of code, given that item1, item2, and item3 are int variables, and stack is an object of the class Stack. Assume that you can store and retrieve variables of type int on stack. Each part is worth two marks. (b) item 1=4 item3 =0 item2 = item1 +1; stack.push(item2); stack push(item2+1); stack.push (item1); item2 = stack.top () ; stack.pop () ; item1 = item2 + 1 ; stack.push(item1); stack.push (item3); while (!stack.isEmpty()) \{ item3 = stack.top () ; stack.pop(); System.out.println(item1); \} System.out.println(item1 +""+item2+""+ item3)