onsider the e vs. k diagrams below, and select the true statement: 1. material b is an indirect bandgap semiconductor and has about the same electron effective mass for electrons as compared to material a. 2. material b is and indirect bandgap semiconductor and has a much larger m* for electrons compared to material a. 3. material b is a direct bandgap semiconductor. 4. material b has a bandgap twice as large in magnitude as material a.