Consider the following five disk five disk access requests of the form (request id, cylinder number) that are present in the disk scheduler queue at a given time.
$(P, 155), (Q,85), (R,110),(S, 30), (T,115)$
Assume the head is positioned at cylinder $100$. The scheduler follows Shortest Seek Time First scheduling to service the requests.
Which one of the following statements is FALSE?
- $T$ is serviced before $P$.
- $Q$ is serviced after $S$,but before $T$.
- The head reverses its direction of movement between servicing of $Q$ and $P$.
- $R$ is serviced before $P$.