1. Show how the APF of FCC was computed. 2. Determine the theoretical density of copper. Compute for the % error of the estimate. 3. Compute for the linear density of Ba in [110] direction, use a = 0.405 nm. 4. Calculate the planar density of Al in (110) plane, use a = 0.405 nm. 5. What is the cross-sectional area and diameter of a tungsten wire that has a length of 1.0 m and a resistance of 0.32 ?