Study the following information carefully and answer the given following questions:
There are two buses, R and S, each having 90 seats, divided equally into three sections: Aisle, Mid, and Front, with 30 seats in each section.
In Bus R, the number of filled aisle seats is 6 more than the number of vacant aisle seats. In the mid-section of Bus R, the ratio of filled to vacant seats is 7: 3. In the front section of Bus R, two-thirds of the seats are filled.
In Bus S, the number of filled front seats is 50% more than that of Bus R. The ratio of filled aisle seats between Bus R and S is 3 : 5. In the mid-section of Bus S, the number of vacant seats is 6 more than the number of filled seats.