A shaft is subjected to an axial pull of 18 kN and a transverse shear force of 8 kN. The yield strength of the shaft material is 200 MPa, and Poisson's ratio is 0.3. Determine the diameter of the shaft using (i) Maximum Shear Stress theory and (ii) Distortion Energy theory (iii) Maximum Stress theory (iv) Maximum Strain Energy theory (v) Maximum Total Strain Energy theory.