A structural component in the form of a very wide plate must be manufactured from alloyed steel with fracture toughness equal to and an elastic limit of $.$ The design stress is equal to $60\%$ of the elastic limit and The design engineer ensures that any critical defect can be detected with equipment whose resolution limit is $.$ Do you agree with the design engineer? $($Advice: review the exercise at Subtheme $2\mathrm{.}5$: Design Using Fracture Mechanics$).$