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.

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