Can anyone help with Physioex 9.0 exercise 3 activity 9?

What does the question ask exactly?

4.   Identify the type of membrane potential (graded receptor potential or action potential) that occurred at R1, R2, R3, and R4 when you applied a moderate stimulus.  (Compare/view the response to the stimulus.)

Answer:A graded stimulus was recorded at R1 and at R3; an AP was recorded at R2 and at R4.

5.    1.   Describe what happened when you applied a strong stimulus to the sensory receptor.  What type(s) of membrane potential were caused?  Were the responses at R1 through R4 all the same?

Answer:  With a strong stimulus, a graded stimulus was recorded at R1 and at R3; an AP was recorded at R2 and at R4; 6 vesicles were released from the axon terminal.