Would you usually expect elasticity of demand or supply to be higher in the short run or in the long run? Why?

For which goods or services will the demand be relatively more or relatively less elastic?  Explain your answers clearly.     Cigarettes   High priced sports car such as a Porsche     Diamonds   Tap water   Heinz (a specific soup brand) Soup     Gasoline

If you are a company that wants to maximize total revenue, what should you do if you have an elastic product ?

Describe how the elasticity of demand behaves in the long run?

XYZ Co. makes a processor that requires a metal that can only be found in a single mine in Peru. Do you expect the price elasticity of supply for this processor to be elastic or inelastic?

If the price of beef went up due to an increase in the incomes of most citizens of a particular county, how would producers react ? explain your answer in terms of price elasticity of supply?

I need some help understanding the elasticity of demand and supply. I need more resources that explain the basics and then move into more difficult concepts with economics.   Thank you-   Jamie Hays