For an engineering application, a plate of a titanium alloy (ti-6a1-4v) with a rectangular cross-section, and a length of 2 m will be subjected to a tensile force of 55 mn. the facture toughness of this alloy is 55 mpaym, the modulus of elasticity is 114 gpa and the yield strength is 910 mpa. a) determine the cross-sectional dimensions of the rectangular plate at the point at which yielding initiates. the ratio of the two sides of the rectangular cross-section is 1: 5. [3 marks] b) at the point at which yielding initiates, given that the deformation is entirely elastic up until this point, what will be the resultant elongation of the plate? [2 marks] c) calculate the size of an interior crack that will lead to catastrophic failure at an applied stress of 50% of its yield strength.