The following six sentences come from a paragraph. The first and the last sentences are given. Choose the order in which the four sentences (PQRS) should appear to complete the paragraph.
S1: There was a boy named Jack.
S6: At last she turned him out of the house.
P: So the mother asked him to find work.
Q: They were very poor.
R: He lived with his mother.
S: But Jack refused to work.
The proper sequence should be: