Please provide the right answer

horizontal alignment consists of two tangent lines connected by a

horizontal curve, as shown in figures below. PC is located at sta. $10+00\mathrm{.}00.$ The overall length of

the horizontal curve is ${400}_{?}$ feet and an $8\%$ superelevation needs to be designed for the curve.

The superelevation runoff length is chosen to be $240$ feet. The normal cross$-$section is also

shown in the figure. Both left and right sections have $2\%$ slopes for drainage. On the circular

curve, the left section is on the external side and therefore needs to be raised while the right

section is on the internal side and should be lowered. The rotation axis is on the center line of

the highway, which is shown as a black dot in the figure.

The Normal Crown of the Cross$-$section

Calculate the tangent runout length $(/)$

From which station does the left section start to be raised?

From which station does the right section start to be lowered?

From which station is a full superelevation rate attained?

From which station does the left section change back to the normal crown from the full superelevation?