The statation of the VPC of a vertical curve is at 6+50, and it is at an elevation of 140ft. if the initial grade equals (-2%), and the station of the VPT is at 16+50 and has an elevatio of 150 ft,...

The station of the vpc of a vertical curve is at 6 so, and it is at an elevation of 140 ft. f the initial grade equals (-2%), and the station of the vPT is at 16 50 and has an elevation of 150 ft, find the following: a) Terminal grade b) Elevation of the highway point that is above the VPI c) Station of the highest point