Direction: Study the following information carefully and answer the questions given below

Eight students A, B, C, D, E, F, G, and H study in the same class. They also live on eight different floors of the same building. There are 40 students in the class with roll number 1 to 40. The floor of the building starts from 1 and goes up to 8.

The person whose roll no. is 30 lives three floors below B. A lives six floors above E and the difference between their roll numbers is 3. C lives four floors below G on an even numbered floor and his roll number is 30% less than that of D. Two people live between the floors on which A and H live and the roll number of H is 5 times the roll number of A and the difference is 20. The average of the roll numbers of the students who live on floor 3, 7, and 8 is 10. The average of the roll no. of F and E is 9 and roll number of D is thrice the roll number of F. Roll number of G is equal to the sum of the roll number of the student who lives on the 1^st and the 5^th floor.