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(20 points) Elasticity A group of consultants estimated the following demand and supply system: qd : 1001; 9 : P (a) (10 points) Find the elasticity of the demand with respect to prices. (Hint: This should be a function of prices) (1)) (5 points) Calculate the elasticity of the demand at the equilibrium price. (c) (5 points) Is the demand: Elastic, Inelastic, Unit-Elastic, Perfectly Inelastic or Perfectly Elastic at the equi- librium price