how to determine the stress block parameters for a RCC element when the stress strain graph is given

The area under the stress-strain curve on a graph represents:

What is the stress-strain curve?*1 pointb) It is the relationship between stress and straina) It is the percentage of stress and stainc) It is the difference between stress and strain

draw a neat sketch of representative stress strain curve given is IS 456 for cold worked deformed bars

The slope of the stress-strain curve in the elastic deformation region is ____________*1 pointa) Elastic modulusc) Poisson’s ratiob) Plastic modulus

Which point on the stress strain curve occurs after the ultimate point?*1 pointa) Last pointd) Material limitb) Breaking pointc) Elastic limit