Angular Momentum
posted by Xavier Hernandez .
2.0 kg particlelike object moves in a plane with velocity components vx = 30 m/s and vy = 35 m/s as it passes through the point with (x, y) coordinates of (3.0, 4.0) m.
(a) What is its angular momentum relative to the origin at this moment?
kg·m2/s k
(b) What is its angular momentum relative to the point (2.0, 2.0) m at this same moment?
kg·m2/s k

I got part a) but how do i do part b) ?