Your current directory `stenton` .
`stenton` and the parent directory for `security` which is `cambridge` are on the same level.
So if need to access anything under `cambridge`, you'd issue:
`ls -l ../cambridge`.
From then on, if you needed to complete the task (using only relative paths):
you'd issue: `cp ../cambridge/security/parking ./parking2` The final "./" means "the current directory".
You could omit the `./` and simply use: `cp ../cambridge/security/parking parking2`.