Qd= 550 - 200P - 0.1R + 100Pb Qd represents the number of bus tickets requested daily; P represents the price of the bus ticket; R represents the average weekly income of public transport users; Pb represents the average cost of a trip by car to cover the same distance. What is the expression of demand for bus transport in the strict sense knowing that R = $ 600 and Pb = $ 5.60? What is the slope of such a demand? Illustrate graphically the considered request. What should the price of a bus ticket be if the Commission de transport de la Rive Sud has only 450 seats every day and aims for a 100% occupancy rate for its buses? We tell you that the average weekly income of public transport users has doubled from $ 600 to $ 1,200, so the average cost of a trip by car has not changed and still remains at Pb = $ 5.60. What is the new expression of demand for bus transport in the strict sense? Illustrate this new demand graphically on the same graph as that of question 3.1.