Assuming that all stations are occupied and all lines are observed in both directions, determine the number of geometric conditions what will be used in the determination of of the strength of figure for a completed quadrilateral. 2 4 6 8 Click to Show/Hide Solution \[ c = (n' - S' + 1) + (n - 2s + 3) \] \[ c = (6 - 4 + 1) + [6 - 2(4) + 3] \] \[ c = (3 - 3 + 1) + (3 - 8 + 3) \] \[ c = 4 \leftarrow \text{answer} \]