Materials processing. Thank you for your help!!

Foaming and Thermoforming (Questions 8,9 and 10 ) 8. What are the processes/methods by which polymer foams are produced? Give one line of description for each method. (6 pts.) 9. (a)What are the main steps in a thermoforming process? (4 pts.) (b)Why are amorphous polymers more commonly thermoformed as compared with semicrystalline polymers? (2 pts.) (c) Draw and explain the thermoforming process window. (4 pts.) 10. The problem in a certain thermoforming operation is that there needs to be more thinning in the walls of the large cup-shaped part. The operation is conventional pressure thermoforming using a positive mold, and the plastic is an ABS sheet with an initial thickness of 3.2mm. (4 pts.) (a) Why is thinning occurring in the walls of the cup? (b) What changes could be made in the operation to correct the