What happens if anything, to the unemployment rate when the long run aggregate supply curve increases?

I think it shifts to the right??

I need some help on this one.

Employment is positively related to total output (GNP). (So, unemployment is therefore negatively related).

So, start with a graph of aggregate supply and demand, GNP on the x axis, prices on the y. Find equilibrium. Now increase supply -- shift the supply curve to the right.
What happens to GNP?