The magnetic field `B` at all points within `a` circular region of the radius `R` is uniform space and directed into the plane of the page in figure. If the magnetic field is increasing at a rate `dB//dt` what are the magnitude and direction of the force on as stationary positive point charge `q` located at points `a,b, c`? (Point a is a distance `r` above the centre of the region, point `b` is a distance `r` to the right to the centre and point `c` is at the centre of the region).