The following readings were taken with a tacheometer with a horizontal line of sight on a vertical staff: 0.9, 1.2, 1.62. Determine the horizontal distance between the staff station to the instrument station and the R.L of the staff station. Consider the R.L of the instrument station is 100.1 m and the height of the trunnion axis is 1.60 m. The additive constant is 0.15 m and the multiplying constant is 100 for the given tachometer.