In the following items, each passage consists of six sentences. The first sentence (S1) and the final sentence (S6) are given. The middle four sentences in each have been removed and jumbled up. These are labelled P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark accordingly on the Answer Sheet. 

S1: When he joined the college, he was an adolescent and immature. 
P: He learnt a lot from his experiences at the college. 
Q: He had to get suitably employed.
R: Four years of study in the college changed him completely. 
S: When he left it he was ready to face the problems of life. 
S6: But his sagacity helped him get a good job.