1. Edgar measures the temperature of a solution at the beginning of an experiment to be. 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 that represents the average change in temperature each minute. (b) 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? Show your work.