A charge of -6mC is moving in an even magnetic field B= 6ay (Wb/m?) with a velocity of 5ax (m/s) starting from the origin. If the mass of the charge is 3 g, solve for the exact position and velocity of the charge after 20 s. (10 marks) (a) (b) (i) A conductive thin wire of length 1 m located at z = 0, x = 4 m carries a current of 10 A in the -ay direction. Solve for the uniform B in the region if the force experienced by the wire is 1.50 x 102 N in the direction of (-ax+a,) (5 marks) (ii) Two infinitely long straight and thin wires, which are placed on the yz plane (x = 0), are located y = - and y = Solve for the force per unit length if both wires are supplied with the same current of laz. (5 marks)