A grade of -2.7% grade intersects a grade of +1.6% at Station 12+ 252.10 of elevations 20.21 meters. These two center grade lines are to be connected by a 111-meter symmetrical vertical parabolic curve. . Find the distance of the lowest point from PVC. At what station will the cross-drainage pipes be situated? . Find the vertical distance between PC and PI. Find the distance between PC and the lowest point.

A-4.4% grade meets a 7.9% grade at a vertex (El. 136.35m) directly under an overpass bridge having underside elevation of 156.79m. A 7.8 meters clearance under the bridge and the center of the curve was observed. Determine the elevation of the invert on center when its location from PC is 91.6m. The pipe has an outside diameter of 0.7 meters and a thickness of 59.8mm. The backfill is 0.7 meters in depth. The bridge is having a width of 14.6 meters. Show solution and Plot.

Pls solve accurate and fast