Two toroidal solenoids are wound around the same pipe so that the magnetic field of one passes through the turns of the other. Solenoid 1 has 700 turns and solenoid 2 has 400 turns. When the current in solenoid 1 is 6.52A, the average flux through each turn of solenoid 2 is 0.0320Wb.
(1) What is the mutual inductance of the pair of solenoids?
(2) When the current in solenoid 2 is 2.54A, what is the average flux through each turn of solenoid 1?