Consider a notched bracket made of aluminium 2024-T351 with a yield strength of 325 MPa and elastic modulus of E = 71 GPa. Assume that the stress-strain behaviour of the aluminium can be presented as elastic, linear hardening with a slope after yielding of 0.2. The bracket is subjected to nominal stress of 200 MPa. Finite element analysis shows that the elastic stress concentration factor at the edge of the notch is 3.35. Determine the stress and strain concentration factors, Ko, K.