In order to organise, Annual Sports Day, a school prepared an eight lane running track with an integrated football field inside the track area as shown below :

The length of the innermost lane of the track is 400 m and each subsequent lane is 7.6 m longer than the preceding lane.
Based on given information, answer the following questions, using the concept of Arithmetic Progression.
(i) What is the length of the 6th lane? [1 Marks]
(ii) How long is the 8th lane than that of the 4th lane? [1 Marks]
(iii) (a) While practicing for a race, a student took one round each in the first six lanes. Find the total distance covered by the student. [2 Marks]
OR
(b) A student took one round each in lane 4 to lane 8. Find the total distance covered by the student. [2 Marks]