B$.$ Measurements from the fourth day on which data were collected look a bit different from the three preceding days. First, describe the difference$($s$)$ you observe between the two sites, relative to the pattern the prior three days $($it may be helpful to zoom in on the figure you created in Excel to really see it$).$ Second, explain what change in the environment may have have brought about these changes in stream temperature. Be sure to explain your response.