Answer
(a) to the right
(b) clockwise
(c) $2.2T$
Work Step by Step
(a) We know that according to the right-hand rule, by reversing the magnetic field direction, the magnetic force will be towards the right.
(b) We know that the induced current direction is clockwise because the field is out of the page.
(c) We know that
$B=\sqrt{\frac{(1.6 N)(12\Omega)}{(2.49m/s)(1.25m)^2}}$
$B=2.2T$
