a car is moving in a constant speed of 40km/hr along a straight road  which heads towards a long vertical wall and makes 90 turn by the side of the wall.a fly flying with a constant speedof 100km/h,starts from the wall towards the car at an instant when the car is 20km away,flies until it reaches the glasspane of the car &retuns to the wall at the same speed.it continues to fly between the car and the wall till the car makes the 90 turn.

             (a)total distance the fly has travelled during this peroid?

              (b)how many trips has it made between the car & the wall?

             (C)suitable graph