2. The vector fields in the following cases have sources in the region of space between = = 0 and = = +d (an infinite slab). For each of the cases below, the divergence and curl outside the slab is zero for all cases. a. Consider the case where there is positive divergence in the slab, but no curl. Draw field lines above and below the slab at right. Explain your reasoning. z= d z =0 b. Now consider the opposite case where there is out-of-the-page curl, but no divergence. Draw field lines above and below the slab at right. Explain your reasoning. z= d z=0 c. Now consider a general case: a vector field that has positive divergence and out-of-the-page curl inside the slab. Draw field lines above and below the slab at right. Explain your reasoning. z= d z =0