5. Beep:

• Load demo4. This time, use a cable to connect the Port B and PB/LED headers.
• Connect the speaker on your board to pin D5. Run a jumper from the Port D header to your breadboard, and then plug the blue wire from the speaker into the same row as the jumper. Connect the black wire from the speaker to ground.
• You should hear a beep when you press the buttons.
• Try inserting a pause between turning on the LED and playing the beep. At what point does the delay become noticeable? What if the beep comes before the light?
• Try finding the minimum noticeable debounce time as in #3 using only the beep as feedback. Is it different?itemize