Construct a plot showing the sequence of events on an oil viscosity vs$.$ pressure for the given reservoir below. A reservoir was discovered in an undersaturated condition $($call this state, point A$).$ Gas was injected to maintain pressure $($point B$),$ and eventually formed a secondary gas cap $($point C$).$ Water injection was employed to increase the reservoir pressure $($above discovery pressure$)$ until an undersaturated condition existed again $($point D$).$ Finally, all injection ceased and the reservoir was blown down to abandonment pressure $($point E$).$