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: Did anything happen?
S6: He did not download or tamper with any of the code to which he gained access.
P: But the intruder did little more than peek and poke around.
Q: Not much, according to Microsoft.
R: He may have seen some of the "source code", the secret recipe, its software.
S: Yes, somebody invaded the firm corporate network.