a. Sketch the (2,1,1) plane, and show whether the direction [O,- 1,1] is in that plane. b. Determine which phases are present in the following regions of the generic phase diagram: a. Region 1-2-3-4-1...

a. Sketch the (2,1,1) plane, and show whether the direction [O,- 1,1] is in that plane.

b. Determine which phases are present in the following regions of the generic phase diagram:

a. Region 1-2-3-4-1