Priority queues can also be used to simulate a FIFO queue. How might you use a PQ as a FIFO queue? In Chapter 9, we described the graph data structure. A depth-first traversal of a graph uses a stack,...

Priority queues can also be used to simulate a FIFO queue. How might you use a PQ as a FIFO queue? In Chapter 9, we described the graph data structure. A depth-first traversal of a graph uses a stack, and a breadth-first traversal of a graph uses a FIFO queue. Can you explain why? Walk through your kitchen and list the number of items that include embedded computers.