3. (a) A single crystal of a metal that has the BCC crystal structure is oriented such that a tensile stress is applied in the [100] direction. If the magnitude of this stress is 4.0MPa, compute the resolved shear stress in the [II] direction on each of the (110), (011) and (101) planes. (b) On the basis of these resolved shear stress values, which slip systems(s) is (are) most favorably oriented.