Edgar measures the temperature of a solution at the beginning of an experiment to be 23 degrees F . He monitors the temperature of the solution every minute for 10 minutes. He records the change in temperature from his previous reading. His data show a decrease of four times, a decrease of three times, no temperature change two times, and an increase of once. (a) Write an expression to represent the average change in temperature each minute. (b) Using your expression from Part (a), determine the average change in temperature for the first trial(c) Edgar repeats the experiment and finds the average change in temperature each minute is greater in the second trial than in the first trial. What is the average change in temperature each minute in the second trial of the experiment?