For a given charged particle, the initial magnetic force is F1 when it moves with speed v in a field B making an angle of 30∘ with the field. The speed is then increased by 20%, the magnetic field is reduced by 10%, and the angle is changed to 45∘. What is the approximate percentage change in the magnitude of the magnetic force?
a) About 24% decrease
b) About 53% increase
c) About 20% increase
d) About 15% increase