In each question, the first and the last sentences of the passage are numbered S1 and S6 respectively. The rest of the passage is split into four parts. These four sentences are jumbled. Read the sentences and identify their correct and logical order.

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S1: Gandhi's first political fast was made soon after his return from Africa.
P: He had also received help from this man's sister.
Q: This was when the poor labourers of the cotton mills of Ahmedabad were on strike.
R: He was a friend of the largest mill-owner.
S: Gandhi had made the strikers promise to remain on strike until the owners agreed to accept the decision of an arbitrator.
S6: He did not fast against the mill owners, but in order to strengthen the determination of the strikers.
The Proper sequence should be: