A living plant leaf is an open system that exchanges energy (sunlight and thermal flows) + matter (O2, CO2, water vapor, etc.) with the surroundings (the exterior). Even with irreversible processes (energy dissipation) we find that the net entropy change for the system + surroundings can decrease; i.e. dS < 0. Using equations presented in lecture and your own critical thinking: a) Explain how this is possible in terms of deS and diS. b) Explain how the Second Law remains valid for this case.