السلام عليكم ورحمة الله وبركاته

I'll be so thankful if you could answer any of these questions


Q 1
an expensive screwdriver is made from a piece of thick low-carbon steel wire. after this wire is stamped into shape at room temperature by a huge press, a plastic handle is attached and the finished screwdriver is packaged for sale. How does the structure of its steel allow this screwdirver to deform so easily when you try to tighten a screw ?






Q 2
apremium quality screwdriver is heat treated. while its tip is given an extremly hard surface that won't deform as it twists a screw, its shaft is made tough so that it won't break under stress. How must the
screwdriver be heat treated to give it these properties? explain






Q 3
with some care, you can cut a cheap stainlee steel knife with a good stainless steel knife. How is that possible?