3.4. A company that makes smoothies is planning to market its product. After a market survey they estimate that a price of $7.50 results in a daily demand of 150 smoothies and a price of $8.75 results in a daily demand of 100 smoothies. a) Use the information above to find the price-demand equation for this product. b) Find the Revenue function R(x) c) Use the price-demand equation to find the domain of the R(x) d) Find the marginal revenue function R'(x), and the marginal revenue at production levels of 150 and 300 smoothies. Interpret your results being specific about all the quantities involved in the answer, include appropriate units.