15. Stadia surveying or tacheometry is a classification of surveying based on instruments used. a. True b. Falsec. c. None 16. It is a process of directly or indirectly measuring vertical distances to determine the elevation of points or differences in elevation. a. Surveying b. Levelling c. Stadia d. None 17. The most commonly employed method of determining the elevation of points some distance apart by a series of set ups of a leveling instrument along a selected route. a. Profile Levelling b. Spirit Levelling c. Stadia Levelling d. None

Pls help ASAP. Pls show all work and circle the final answers pls.

6.  For the data in Problem 5 of Chapter 6, calculate 6 σ, Cp, and Cpk.  Interpret the indices.  The specification limits are 50 +/- 0.5. 225.00 226.00 227.00 226.00 227.00 228.00 228.00 229.00 222.00 223.00 224.00 226.00 227.00 228.00 225.00 221.00 227.00 229.00 230.00

the answer choices are given in the picture.... the answers provided are not even options from the picture