Hi, please use 5 decimal places in intermediate steps and draw a figure. Thank you very much

An ascending grade of 3% intersects another grade at STA 12+598 whose elevation is at 518.99m. The change in grade is -0.15% per 20m station. The two grades are to be connected by a parabolic curve, 600m long. 3. Determine the elevation of the third quarter point on the tangent and the elevation of the summit. The tangents of a spiral curve intersect at an angle of 22.5 at STA 12+598. The degree of the central curve is 4 and the length of the spiral curve is 51.89. 4. Determine the distance from the intersection of the tangents at TS and ST and the midpoint of the long chord joining SC and CS. An ascending grade of 3% intersects another grade at STA 12+598 whose elevation is at 518.99m. The change in grade is -0.15% per 20m station. The two grades are to be connected by a parabolic curve, 600m long. 3. Determine the elevation of the third quarter point on the tangent and the elevation of the summit. The tangents of a spiral curve intersect at an angle of 22.5 at STA 12+598. The degree of the central curve is 4 and the length of the spiral curve is 51.89. 4. Determine the distance from the intersection of the tangents at TS and ST and the midpoint of the long chord joining SC and CS