1. (10 pts.) In metals the mechanical properties are often determined by the motion of dislocations. Dislocations are fundamentally a crystalline defect in materials. a. (5 pts.) In the FCC structure the dislocation slips in the direction and on the {111} planes (slip planes). On the diagram below identify all of the direction if the crystal is at the center with the [001] direction normal to the page. b. (5 pts.) In the BCC structure dislocations slip in the direction, on the figure blow identify these directions.