In the figure, a small particle of charge -BxC and mass m=Dx 10-11kg has speed v0=Bx 102m/s as it enters a region of uniform magnetic field. The particle is initially traveling perpendicular to the magnetic field and is observed to travel in the semicircular path shown with radiusR=C/100 cm. Find the magnitude and direction of the magnetic field in the region

B= 10

C= 137

D= 10