Examine the video link below. It is another debugging session of the queue from Project $4.$ In the $30$ second video you will see:

The pointer selects the Producer BD thread and shortly draws your attention to the values of head, size and tail.

The pointer selects the Producer HW thread and shortly draws your attention to $($different$)$ values of head, size and tail. Some of the queue elements are different.

The pointer selects the Consumer thread and then draws your attention to $($different$)$ values of head, size and tail. Some of the queue elements are different.

The pointer runs the Consumer thread until its next break point. You should notice a change in the values head and size. And all of the Consumer queue elements will match the queue elements seen by one of the other threads at the start of the video.

Why is size and tail different and why is consumer size change when run.mov

NOTE: When you open the video, you may wish to increase the quality. To do so$,$ click on the gear box in the lower right corner of the video and select Quality. Choose the highest setting.

Question: When debugging, which thread has the correct, current values of the queue elements and head, size and tail?