Sure no problem, and just PM me if you have any further questions - happy to share my revision tips and stuff that helped me get 100% last year in my AS.
So let's suppose there is "excess supply" - this occurs when the price is ABOVE equilibrium.
That means there is more quantity being supplied than being demanded.
Imagine you're a shopkeeper and you have 20 bananas to supply but only 12 are being demanded, and you're charging 80p per banana.
8 of your bananas are going to waste because people aren't buying them
So how would you change your price?
Well you'd reduce your price to sell of the excess supply of bananas! And so the price will fall back to the equilibrium price (PM if you need a full explanation).
Okay, so now let's consider "excess demand" - this occurs when the price is BELOW equilibrium.
That means there is more quantity being demanded than being supplied.
So imagine you're a consumer and you demand 20 bananas but the shopkeeper is only supplying 12 bananas for 40p each.
There is excess demand of 8 bananas - you're not getting all the bananas you want
So to get the shopkeeper to supply more bananas, how might you change the price you offer him?
Well you'll offer him a HIGHER price! That way he's motivated to supply more bananas to you.
So when there's excess demand the price will rise back to the EQUILIBRIUM price!