Specification for a Queue Interface

Exercises:

Trace the following fragment for a Stack<String> s and an empty queue q (type Queue<String>).

while (!s.empty()){    item = s.pop();    q.offer(item); } while(!q.isEmpty()){    item = q.remove();    s.push(item); }

a. What is stored in stack s after the first loop executes?  What is stored in queue q after the first loop executes?

b. What is stored in stack s after the second loop executes?  What is stored in queue q after the second loop executes?