physics question

I. A voice coil is the coil of wire around the tube attached to the apex of the speaker cone. The voice coil provides the motive force to the cone by the reaction of a magnetic eld to the current passing through it. Suppose a 0.20-kg voice coil of a subwoofer has a diameter of 2.5 x 10'2 meters and has wires wound 55 times around the tube. This voice coil is in a magnetic eld of 0.10 Tesla. A. Determine the magnetic force that acts on the coil and the cone. 3. Determine the acceleration of the voice coil and the cone