Figure shows the to views of a rod that can slide without friction. The resistor is `6.0Omega` and a `2.5T` magnetic field is directed perpendicularly downward into the paper. Let `l=1.20m`.

a. Calculate the force `F` required to move the rod to the right at a constant speed of `2.0 m/s`,
b. At what rate is energy deliered to the resistor?
c. Show that this rate is equal to the rate of work done by the applied force.