Apoint charge q moves on the x-axis in the positive direction with a speed of 290 m/s. a point p is on the y-axis at y = +60 mm. the magnetic field produced at point p, as the charge moves through the origin, is equal to -0.3 μt k^. when the charge is at x = +40 mm, what is the magnitude of the magnetic field at point p? (μ0 = 4π × 10-7 t · m/a)

0.22 μt
0.38 μt
0.17 μt
0.33 μt
0.28 μt