Not too sure about this problem

Esmeralda sells Brussels sprouts at a local farmer's market. Until recently she was charging $3.50 for a pound of Brussels sprouts and was selling 60 pounds a day. She recently increased the price to $4.50 per pound, and as a result her sales dropped to 40 pounds per day. (a) Using the midpoint rule, what is the price elasticity of demand for Esmeralda's Brussels sprouts? (b) Is the demand for the Brussels sprouts elastic or inelastic? (Enter only Elastic or Inelastic, do not answer as a complete sentence] (c) Does her total revenue increase or decrease with the change in price? (Enter only Increase or Decrease, do not answer as a complete sentence]