Solve this - Question on Broad Gauge Track Super elevation, speed limit and transition length

Can Anyone help me in solving the below question.

A 2 degree curve on a high-speed BG section has maximum sanctioned speed of 125 km/hr, the equilibrium speed is 85 km/hr and speed of good train on the section is 55 km/hr.

calculate the following;
a) Superelevation
b) Maximum permissible speed.
c) Transition Length.

Thank You
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