The Mesa Redbirds football team plays in a stadium with a seating capacity of 80,000. However, during the past season, attendance averaged only 50,000. The average ticket price was $30. If price elasticity of demand is -4, what price would the team have to charge in order to fill the stadium? If price were to be decrease to $27 and the average attendance increase to 60,000, what would the price elasticity?