6. (30 points) Special Problem. BM Zulu has an elevation of 310.36 ft. You wish to establish the elevation of a new benchmark to be known as BM Boracho. A vertical control survey was completed. Use the sketch below to complete the field notes, as follows: a) Compute all elevations, b) Complete the arithmetic check, c) Determine the error of closure, d) If the error is acceptable, adjust the elevations. Assumptions: The distances between points are equal. Allowable error (mm) = 2*(No. of Turning Point)0.5