Ellipse Curve Cryptography

I did not know the way to solve the challenge after some naive idea of using Pohlig-Hellman on the smooth prime given. Nonetheless, it was a good try as after peeking at the solution, there is no shot that I can solve this without knowing some group theory of have acute observation of the number patterns. The first way to solve this, and one can look up in this paper, about Genus 0 Curves....