Complete the Crayfish Heartrate Lab Report. Remember that you are not to present raw data. You should be calculating averages of the change in heartrate for a particular treatment over all of the specimens for which you have data that fits that particular treatment. For example, find the difference in heartrate between the baseline and the serotonin treatment for all specimens that were treated with serotonin. Take an average of the change in heartrate over all of those specimens and report that number in your table. Make sure that you also report the number of specimens used to calculate each average.