A1:Crystal Structure (Chapter 1) 7 points a)Draw all the atom positions for BCC and FCC structures in the following unit cell.And mark one of the octahedral gap positions for BCC and FCC respectively in the figure.(3 points) BCC FCC Z b)What is the difference between octahedral gap in FCC and BCC crystal lattice with respect to the space dimensions?(1 point) c)For FCC crystal lattice,write down the mathematic relation between the radius of the octahedral void r,the radius of atom R and the lattice constant a.For BCC crystal lattice,write down TWO different mathematic relations between the radius of octahedral voids r,the radius of atom R and the lattice constant a.(3 points) A2:Texture(Chapter 2) 4points a)What is meant by crystallographic texture?(0.5 points) b)Which is the most important recrystallization component of rolled Aluminium?Give the miller indices of this orientation and plot it in the (200)-polfigure.(2.5 points) c)Give two examples for the technical relevance of crystallographic textures.(1 point)1 A1: Crystal Structure (Chapter 1) 7 points a) Draw all the atom positions for BCC and FCC structures in the following unit cell. And mark one of the octahedral gap positions for BCC and FCC respectively in the figure. (3 points) BCC FCC b) What is the difference between octahedral gap in FCC and BCC crystal lattice with respect to the space dimensions? (1 point) c) For FCC crystal lattice, write down the mathematic relation between the radius of the octahedral void r, the radius of atom R and the lattice constant a. For BCC crystal lattice, write down TWO different mathematic relations between the radius of octahedral voids r, the radius of atom R and the lattice constant a. (3 points) A2: Texture (Chapter 2) 4points a) What is meant by crystallographic texture? (0.5 points) b) Which is the most important recrystallization component of rolled Aluminium? Give the miller indices of this orientation and plot it in the {200}-polfigure. (2.5 points) c) Give two examples for the technical relevance of crystallographic textures. (1 point)