23. An EDM is set on Sta A whose elevation is 150.25 ft. The HI is measured as 5.20 ft. The zenith angle to the prism at Sta B is 88015', and the slope distance is measured as 765.85 ft. The height of the prism rod (HR) is 7.60 ft. What is the elevation of Sta B? from Cuomo, Surveying Principles for Civil Engineers) (a) 124.47 ft (b) 160.83 ft C) 171.23 ft 'd) 186.43 ft