| Instruments/Parts of instruments | Operations | ||
| P | Bubble tube | i | Tacheometry |
| Q | Plumb bob | ii | Minor movements |
| R | Tangent screw | iii | Centering |
| S | Stadia cross-wire | iv | Levelling |
Consider a five-digit number PQRST that has distinct digits P, Q, R, S, and T, and satisfies the following conditions:
1. \( P<Q \)
2. \( S>P>T \)
3. \( R<T \)
If integers 1 through 5 are used to construct such a number, the value of P is:


