There are two same metals which will be plastically deformed through reducing their cross-section areas. The first metal has a rectangular cross-section while the second one has a circle cross-section. These cross-section shapes will not change during the process. The initial sizes of the cross-sections are listed as below: Rectangular length, mm Circle diameter, mm Initial cross-section size 110x110 16 Deformed cross-section size 50x120 12.6 Which of these samples will be the hardest after the deformation and explain the reason. [hint: the higher plastic deformation has higher hardness]