Which point plotted on this production possibility graph demonstrates underutilization of resources?

100mg magnesium reacts with 20ml of 1.0m hcl

Put these processes of the water cycle in the correct order, starting at the point where the water is in the lake: 1. water evaporates into the atmosphere 2. rain, snow, or other precipitation falls 3. water collects into larger bodies of water 4. water vapor condenses into liquid water

What reaction is taking place? 02 + c3h8 = h20 + co2