Assuming that all stations are occupied and all lines are observed in both directions, compute the strength of figure factor for a hexagon with interior station.
0.60
0.56
0.68
0.70
\[
c = (n’ – S’ + 1) + (n – 2s + 3)
\]
\[
c = (12 – 7 + 1) + [12 – 2(7) + 3]
\]
\[
c = (12 – 7 + 1) + (12 – 14 + 3)
\]
\[
c = 7
\]
\[
F = \frac{D – c}{D}
\]
\[
F = \frac{22 – 7}{22}
\]
\[
F = 0.68 \leftarrow \text{answer}
\]