1. Unlike the discrete waveform from an electrocardiogram, the electromyogram waveform is irregular. Why do you suppose this is? (2)2. In your own words, explain how the EMG trace changed when you added weights to your arm? Based on the data you collected what can you infer is happening to the muscles as weight is added? (2)Exercise 2: Alternating activity and coactivation3. In your own words what is coactivation? What are some explanations you can come up with for this phenomenon? (2)4. Coactivation of abdominal muscle and muscles supporting the spine has been shown to be essential for the bipedal posture of humans. Based on your data, is the coactivation of the triceps necessary for proper functioning of the biceps and vice versa? (2)Exercises 3 & 4: Evoked EMG & nerve conduction velocity5. List the physiological events that occur between delivery of the stimulus and the start of the recorded response (i.e. during the latent period). (9)6. Which of the contributions to the latent period (that you listed in question 1 above) depends on the position of the stimulating electrode? (2)7. Based on your results and calculations for nerve conduction velocity, how long would it take for a nerve impulse to travel from the spinal cord to the big toe? Assume that the distance traveled is one meter. 8. Was there variability in the nerve conduction velocity amongst members of your group? What are some explanations for this? (2)