5. Determine if the following statements are (i) true, (ii) false, or ii) impossible to determine due to lack of information. Explain each of your answers with a few words. (a) Any metal will constitute a better magnetic-circuit material than air. (b) Electrons propagating in a magnetic field will experience a (non-zero) magnetic force (c) The following vector field, a(x, y), has divergence (ji.e. div a *0): (d) The following vector field, a(x,y), has divergence (i.e. diva # 0)