2. LIST and quickly explain 8 surface hardening (case hardening) methods. Use CES software (level 3) to create graphs ranking the hardening technique by surface hardness and coating thickness. These techniques should be listed in CES as "Heat Treatments and lon Implantation" processes so make sure you limit your results to only those materials with a tree stage. Get rid of all grey results by clicking "hide failed results" in the box above the graph. Make a bubble chart of surface coating thickness vs. surface hardness. There should be 3 graphs overall. Include LEGIBLE labels on the processes. Make sure you can still read them after copy/pasting into the word document.