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Solved - Vertical parabolic curve - PVI, PVC and PVT and Elevations at different stations along Curve

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Hi,  Here is the example which shows you how to solve for the vertical transition curve elevation.
Problem: A 3% grade intersects a -2% grade at station 4+350m with an elevation of 190.5m. Given that a 250m symmetrical parabolic curve highway is utilized, determine: elevation in meters at station 4+240
elevation in meters at station 4+260
elevation in meters at station 4+280
elevation in meters at station 4+300
Solution: Please refer the images below.

thanks!