Wrong answer will be downvoted.
An anallactic tacheometer in use on a remote survey was damaged und it was decided to use a glass diaphragm not originally designed for the instrument. The spacing to the outer lines of the new diaphragm was 1.25 mm, focal lengths of the object glass and anallactic lens 75 mm, fixed distance between object glass and trunnion axis 75 mm, and the anallactic lens could be moved by an adjusting screw between its limiting positions 75 mm and 100 mm from the object glass. In order to make the multiplier 100, it was decided to adjust the position of the anallactic lens, or if this proved inadequate, to graduate a special staff for use with the instrument. Make calculation to determine which course was necessary and if a special staff is required, determine the correct calibration and the additive constant.
