Do you have evidence that cellular respiration and photosynthesis occurred in leaves from the given information?
Oxygen rate of production/consumption--> 0.01754
Carbon Dioxide rate of production/consumption--> 0.02222
Oxygen rate of production/consumption--> -0.4097
Carbon Dioxide rate of production/consumption--> -0.06382
Photosynthesis is the process by which green plants convert sunlight energy into the chemical energy of food. They consume carbon dioxide and produce oxygen in this process. Since light is required for this process, it can only take place during sunlight hours. Cellular respiration is the process by which plants (and other life forms), break the food molecules and generate energy molecules, ATP. In this process, plants consume oxygen and produce carbon dioxide. Cellular respiration takes place continuously, with or without the presence of light.
An evidence of the occurrence of these processes, photosynthesis and cellular respiration, is the production of carbon dioxide and oxygen. During the daylight hours, oxygen production will be more than carbon dioxide production, becuase both processes are working simultaneously. In darkness, cellular respiration will dominate and thus carbon dioxide production will dominate.
With the given data, it is clear that oxygen and carbon dioxide production or consumption numbers are changing between light and darkness and hence we can conclude that the two processes are working. It would have really helped if the meaning of positive and negative signs was given, then we could have discussed (in more detail) the rates of gas production and consumption.
Hope this helps.