The question contains three quantities: Quantity I, Quantity II, and Quantity III. Read the question carefully and solve it accordingly.

Quantity 1: Raman makes four journeys of equal distance. In the first journey, his speed was 200 km/hr and in each subsequent journey, his speed was half the speed of the previous journey. What is the average speed of Raman in these four journeys?

Quantity 2: The distance between two stations P and Q is 500 km. A train covers the journey from P to Q at 60 km per hour and returns back to P with a uniform speed of 40 km per hour. Find the average speed of the train during the whole journey.

Quantity 3: The total number of students in sections A and B of a class is 200. The number of students in section B is 40 less than that of section A. The average score of section B, in a test is 20% more than that of students in A. If the average score of all the students in the class is 48.6, what is the average score of the students in A?