a) Show by providing required calculation for a given perfect grystall of a BCC structure and atomic weight 55.86 u. i.which one from the selected set of planes (111), (232),

(321), (433) is preferrable for dislocations movement?(10 Marks) ii.for a preffarable slip plane (the answer of the question a(i)) an interpalanar distance is 1.73 Angstroms. Calculate density of the given crystalline material.(10 Marks):=