1. LiF has the [Rocksalt] structure. For this structure: a. Make a drawing of the unit cell using the hard sphere model with complete spheres. b. Make a drawing the unit cell using the hard sphere model with only the unit cell shown (remove volume of spheres outside of the unit cell). c. Make a drawing of the unit cell using the reduced sphere ("ball and stick") model. d. Calculate the lattice parameter. e. How many of each type of atom are in the unit cell? f. Calculate the theoretical density. g. What is the actual density