Assuming that all stations are occupied and all lines are observed in both directions, compute the strength of figure factor for a quadrilateral with interior station and one diagonal.
0.46
0.56
0.66
0.76
\[
c = (n’ – S’ + 1) + (n – 2s + 3)
\]
\[
c = (9 – 5 + 1) + [9 – 2(5) + 3]
\]
\[
c = (9 – 5 + 1) + (9 – 10 + 3)
\]
\[
c = 7
\]
\[
F = \frac{D – c}{D}
\]
\[
F = \frac{16 – 7}{16}
\]
\[
F = 0.56 \leftarrow \text{answer}
\]