An 8mm thick brass [E=83 GPa; v = 0.33] plate is subjected to biaxial stress with sigma x = 180 MPa and sigma y = 65 MPa. The plate dimensions are b = 350 mm and h = 175 mm. Determine:
1. The change in length of edges AB and AD
2. The change in length of diagonal AC
3. The change in thickness of the plate