Which explains why the price indicated by p2 on the graph is lower than the equilibrium price?

as prices fall, demand goes up.
as prices fall, demand goes down.
as prices fall, demand stays the same.
as prices fall, demand disappears

which needs to happen in order to stop disequilibrium from occurring?

q needs to be coordinated with supply.
q needs to be coordinated with demand.
the price of goods needs to be increased.
the price of goods needs to be decreased.