1. Using the following data, what is the difference in elevation between BM-12 and BM-13? Station BS FS BM-12 4.64 1 5.80 5.06 2 2.25 5.02 3 6.02 5.85 BM-13 4.34 2. Using the following data, determine the elevation in BM-13? ELEV 209.65 Station BS FS ELEV BM-12 4.64 209.65 1 5.80 5.06 2 2.25 5.02 3 6.02 5.85 BM-13 4.34 3. Points A and B are 525.850 meters apart. A level is set up on the line between A and B and at a distance of 240.5 m from point A. if the rod reading on A is 3.455m and on B is 2.806m, determine the difference in elevation between the two points considering the effects of curvature and refraction. 4. In a two-peg test of a dumpy level, the following observations are taken. What is the true difference in elevation between A and B? Instrument at A Instrument at B Rod Reading on A 1.508 Rod Reading on B 2.024 0.938 1.449 5. Point A has an unknown elevation. The instrument was set 1.14m above point B and point A was observed at an inclination angle of 32. After that, the instrument was moved towards point A and was set 1.22m above point C and point A was observed at an inclination angle of 78. If the distance between points B and C is 30m, what is the elevation of point A assuming that points B and C are of the same elevation and at elevation Om.