A certain plant cell uses a molecular motor to transport large molecules across the cell. The energy for the motor is provided by ATP (adenosine triphosphate). The force exerted by the motor is given g F = 71x What is the work done by this motor between the distances of 1 and 3 distance units? Hint: evalua|te the following integral. The unit for work in this case is picojoules (95; or 10-12 J)