the stress vs strain diagram of a tensile test for a ductile cast iron having rectangular cross section with dimensions of thickness $=6mm$ and width $=7mm.$ The lenght of the rod is $75mm.$ Determine the following propertiesof this material

a$)$ compute the elastic modulus

b$)$ Determine the yield strenght

C$)$ Determine the tensile strenght

d$)$ Determine the ductility in percent elongation

e$)$Determine the fracture strenght f$)$ determine the modulus of resilience

g$)$ a load of $25000$ N is applied to the material. calculate the change in

lenght of the rod orginally $75$mm