Fast Please

S. [20 points] Your task is to compute a session key in a Diffie-Hellman Key Exchange protocol based on elliptic curves. Your private key is a=6. You receive Bob's public key B=(5,9). The elliptic curve being used is defined by y2x3+x+6mod11 Elliptic Curve Point Addition and Point Doubling x3=s2x1x2modpy3=s(x1x3)y1modp where s={x2x1y2y1modp;ifP=Q(pointaddition)2y13x12+amodp;ifP=Q(pointdoubling)