supply and demand elasticity

CI 2. (A) The monthly supply of desktop personal computers is given by the equation 05 = 15.000 + 43.?5P. At a price of $800, what is the price elasticity of supply? a 2. (a) The British Automobile Company is introducing a brand new model called the "London Special." Using the latest forecasting techniques, BAC economists have developed the following demand function for the ''London Special": CID = 1,200,000 - 4UP a) What is the point price elasticity of demand at prices of (a) $8,000 and {in} $10,000? b) Is it Elastic, Unit Elastic or Inelastic, Explain why