Directions: The following question consists of six sentences. The first sentence (S1) and final sentence (S6) are given in the beginning. The middle four sentences in each have been jumbled up. They are labeled P, Q, R and S. You are to find the correct sequence of the four sentences.S1: Scientist have found that any train running on wheels cannot go faster than 300 kilometers an hour. S6: Japanese engineers are, therefore, planning another kind of train, a magnetic train without, wheels, which would also float above the ground. P: One way of building such trains has already been tried out Q: If we want trains which can go still faster we must build them without wheels. R: But it would not be possible to run them on the Tokaido line because in same tunnels there would not be enough air to support them S: Here, the whole train floats above the ground on top of a cushion of air created by powerful fans.