Assuming that all stations are occupied and all lines are observed in both directions, compute the strength of figure factor for a triangle with interior station.
0.40
0.50
0.60
0.70
\[
c = (n’ – S’ + 1) + (n – 2s + 3)
\]
\[
c = (6 – 4 + 1) + [6 – 2(4) + 3]
\]
\[
c = (3 – 3 + 1) + (3 – 8 + 3)
\]
\[
c = 4
\]
\[
F = \frac{D – c}{D}
\]
\[
F = \frac{10 – 4}{10}
\]
\[
F = 0.60 \leftarrow \text{answer}
\]