Consider the pin-jointed truss shown in the figure. Influence line is drawn for the axial force in the member G-I, when a unit load travels on the bottom chord of the truss.
Identify the CORRECT influence line from the following options:
Note: Positive value corresponds to tension and negative value corresponds to compression in the member.

| Points | Staff readings (m) | Remarks | |
| Back Sight | Fore Sight | ||
| P | (-)2.050 | BM: +200.00 m | |
| Q | 1.050 | 0.950 | Q is a change point |
| R | (-)1.655 | ||