7. The monthly demand for your product is estimated to be Q = 0.3 - 8.5 P + 10 P. + 3.21 + 36 F where O is the quantity of your good (in thousands), P is the price of your good; P, is the price of a related good (prices are both in dollars), / is income in thousands of dollars, and F is a variable that equals one during the month of February and zero otherwise. For your data set, the averages of the variables are O = 100, P = 20, P, = 15, and I = 45. a. Is this good a necessity, luxury or inferior good? b. Is the related good a substitute or a complement? c. If you lower the price of this good, will revenue increase, decrease or stay the same? Please show how you obtained your answer. d. Your firm requested estimates for three different demands: the demand for Christmas trees, red long-stem roses, and fireworks. Which demand is this one