Z 6. Use the provided information to answer the following questions about the structure of Tetragonal tungsten bronze (TTB) structure. Formula Unit: Nao.W03 Space Group: P4mm Cell Contents: 2 formula units per cell Cell Dimensions: a - 5.248A, C = c = 3.8958 Atomic Positions: w in (2c): (0, y, z), (3, 0, Z 2 = 0.435 0.1 Na in (2a): (0, 0, 0), (us, , 0) (1) in (2c): (0, , 2), (1, 0, 2) 0.935 (2) in (4e): (*, , ), (, , b), (, , ), (, , *) a) What is the Bravais Lattice of this crystal structure? b) Define the symmetry operation represented by each of the components in the Space Group symbol. c) What is the Point Group from which this Space Group is derived? d) Does this point Group possess a center of symmetry? e) Sketch the 2-D projection for this structure, with ALL atomic positions labeled, on the (001) plane (the top plane of the unit cell). Be sure to also indicate positions of any superimposed atoms