Which of the following actions is expected to increase the elastic modulus of a semicrystalline polymer? Select as many as appropriate. 1.increasing the volume fraction of crystalline phase (vs amorphous phase) 2.deformation by drawing (consider the elastic modulus parallel to the drawing direction) 3.annealing of undeformed material 4.annealing of material that has been deformed by drawing (consider the elastic modulus parallel to the drawing direction)