Part B -Solve or describe the following problems: 9. Explain the difference in ductility between metallic and ceramic materials (verbally and/or by illustrating). 10. Solve below problem (similar to textbook Prob 2.2, 9h Ed.) Silicon has three naturally occurring isotopes: 92.23% of 28S1, with an atomic weight of 27.9769 amu, 4.68% of Si, with an atomic weight of 28.9765 amu, and 3.09% of 30si , with an atomic weight of 29.9738 amu. On the basis of these data, confirm that the average atomic weight of Si is 28.0854 amu