Calculate the secret that Alice and Bob agree upon via Elliptic Curve Diffie Hellman
Key Exchange using the values specified above. Also provide the coordinates sent
over the public channel by Alice and Bob in establishing the shared secret.

The public Elliptic Curve constant a is: -7
The public Elliptic Curve constant b is: 10
The public field value p: 1009
The public generator point P is: (1,2)
Alice's private number is: 13
Bob's private number is: 117