In a geometric leveling survey, the readings on the ruler for the intermediate points (PI) and change point (PM) are shown in the table below. Use ...

In a geometric leveling survey, the readings on the ruler for the intermediate points (PI) and change point (PM) are shown in the table below. Use this information to answer questions 18, 19, and 20.

Readings on the Ruler

Stakes FI FM FS
A 2.95 -
B 3.15 -
C - 0.35
D - 3.00
E 2.15 -
F - -
PI = Intermediate Points; PM = Change Point
Data: Elevation of Point A = 10.00 m
The stakes are located in the terrain at a distance of 20 m from each other.
18. What are the elevations of stakes B, D, and F, respectively?
19. What are the level differences between stakes (B-C), (C-D), and (D-E), respectively?
20. Considering the construction of a ramp that connects stakes A and F, what are the cut or fill heights at stakes C, D, and E, respectively?
18. The elevations of stakes B, D, and F are 11.95 m, 12.10 m, and 15.40 m, respectively.
19. The level differences between stakes (B-C), (C-D), and (D-E) are +2.80 m, +2.28 m, and +2.80 m, respectively.
20. Considering the construction of a ramp that connects stakes A and F, the cut or fill heights at stakes C, D, and E are 2.59 m of fill, 1.14 m of cut, and 0.02 m of cut, respectively.
a) 18 - a, 19 - a, 20 - a
b) 18 - b, 19 - b, 20 - b
c) 18 - a, 19 - c, 20 - a
d) 18 - c, 19 - a, 20 - b