Daniel1985

The elasticity of supply is how much the quantity supplied is affected by the MARKET price:

Using the example from SN:

Let's say the demand for coffee increases and thus the price per pound increases. With the new higher price more coffee producers will be willing to supply more coffee and thus the quanity supplied increases as well.

There are also several factors that affect how the quantity supplied will respond to changes in price (page 15 of SN).

I'm not sure about your second question--I think the elasticity of supply and the elasticity of demand are independent but I'm not sure.