Show what is written by the following segments of code, given that item1, item2, and item3 are int variables. Must show all steps. stacktype stack; item1 = 4; item3 = 0; item2 = item1 + 1; stack.push(item2); stack.push(item2 + 1); stack.push(item1); stack.pop(item2); item1 = item2 + 1; stack.push (item1); stack.push (item3); while (!stack.isempty()) {stack.pop(item3); cout