4. Identify the fallowing processes based on the description. (4 pts) a) Increasing the hardness of a material by plastic deformation. b) Creating a product by pouring molten metal into a mold. c) Joining two dissimilar materials by using a lead based filler that flows into the seam. Done at temperatures below 449°C. d) Process by which an indenter is pressed into the surface of a material to determine a material property.