( my some basic concepts are not good so please explain in step wise clear way)

Q.3 (a) Explain the following strengthening mechanisms : (2) (i) grain size refinement, (ii) solid solution strengthening. (b) Plot the Engineering stress-Engineering strain curve and True stress-True strain curve for a metallic sample. (2) of 3000 psi is applied to this crystal along the [001] direction. What is the resolved shear stress along the slip direction? (d) Calculate the Young's modulus of a composite containing 60 vol\% of glass fibre (Y=70GNm2) in (2) a matrix of epoxy resin (Y=3GNm2) under isostress conditions. Q.3 (a) Explain the following strengthening mechanisms : (2) (i) grain size refinement, (ii) solid solution strengthening. (b) Plot the Engineering stress-Engineering strain curve and True stress-True strain curve for a metallic sample. (2) of 3000 psi is applied to this crystal along the [001] direction. What is the resolved shear stress along the slip direction? (d) Calculate the Young's modulus of a composite containing 60 vol\% of glass fibre (Y=70GNm2) in (2) a matrix of epoxy resin (Y=3GNm2) under isostress conditions