Hi, can someone help me with this please.

Assume a continuous, straight line demand curve which includes the following data points for gallons of milk: Assume that the initial market clearing price for milk is $4 per gallon. Now suppose that a reduction in the stock of dairy cattle has caused a leftward shift in the supply of milk, resulting in an increase in the market price to $6 per gallon. A. Using the midpoint method, calculate the price elasticity of demand over this range. Is it elastic, unit elastic, or inelastic over this range? {Round to two decimal places} B. Is the price elasticity of demand a positive or negative number? Why? C. How much total revenue did milk suppliers collectively receive when the price of milk was $4 per gallon? How much total revenue did milk suppliers collectively receive when the price of milk was $6 per gallon? D. Calculate the price effect and the quantity effect associated with the price change from $4 to $6 (provide the actual, numerical values and be careful about the sign}. How does this relate to your answer to part (c) of this