Please help with steps and explanations. Please and thank you

Current Attempt in Progress In the figure below, 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 6.56 m/s along them. A magnetic field with B = 0.278 T is directed out of the page. Calculate (a) the flux through the triangle formed by the rails and bar at t = 3.43 s and (b) the emf around the triangle at that time. (c) If the emf is & = at", where a and n are constants, what is the value of n? (a) Number i Units (b) Number i Units (c) Number i Units