At a Certain Instant of Time a Particle with Charge $\mu$

Multiple Choice

At a certain instant of time a particle with charge q = 25 $\mu$ C is located at x = 4.0 m,y = 2.0 m; its velocity at that time is v = -20 m/s .If you are at the origin,what do you measure as the magnitude of the magnetic field due to this moving point charge?

A) 6.8 pT
B) 1.1 pT
C) 5.6 pT
D) 2.2 pT
E) 4.4 pT