A symmetrical parabolic curve passes through point A whose elevation is 23.33m at a distance of 54m from the PC. The elevation of the PC at station 4+100 is 22.56m. The grade of the back tangent is +2% and the length of the curve is 120m. 5. Determine the grade of the forward tangent. 6. Determine the stationing of the highest point of the curve. 7. Elevation of the highest point

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