5.(optional)Following is a series of diffraction patterns acquired from an aluminum grain which contains a single dislocation.After recording the first pattern(SAD1) the sample was tilted 36+2 to acquire the second pattern(SAD2).The sample was then tilted a further 22+2 to obtain the third pattern (SAD3).On each of these three diffraction patterns a reflection used to form a two-beam image is indicated for which the dislocation contrast was absent. a)Solve all three diffraction patterns. b)Determine the Burgers vector of the dislocation. (a)SAD1●●● (b)SAD2 ● ● ● 。。。(●)· ● ●●● ●●● (c)SAD35. (optional) Following is a series of diffraction patterns acquired from an aluminum grain which contains a single dislocation. After recording the first pattern (SAD1) the sample was tilted 362 o to acquire the second pattern (SAD2). The sample was then tilted a further 22  2 o to obtain the third pattern (SAD3). On each of these three diffraction patterns a reflection used to form a two-beam image is indicated for which the dislocation contrast was absent. a) Solve all three diffraction patterns. b) Determine the Burgers vector of the dislocation