In Figure two straight conducting rails form a right angle. A conducting bar in contact with the rails starts at the vertex at time t = 0 and moves with a constant velocity of 5.20 m/s along them. A magnetic field with B = 0.350 T is directed out of the page. Calculate

(a) The flux through the triangle formed by the rails and bar at t = 3.00 s and?

(b) The emf around the triangle at that time.

(c) If the emf is ξ = at n, where a and n are constant, what is the value of n?