The following causal loop diagram demonstrate the dynamics of water in a lake over time as a result of different natural causes. It also incorporates some human interference through the variable Exports. Expand the causal loop diagram to include a policy to control water exports as a function of the lake's water surface elevation. Assume that higher exports are permitted when the elevation exceeds a safe level. When the elevation declines, exports must decline. Draw any new loops that appear in the diagram because of this policy