QUESTION 1 (25 MARKS] Casting process is a process that involves pouring molten metal into a mold, allowing it to solidify, and removing the part from the mold. Discuss the reasons of casting products may have to be subjected to various heat treatments. [10 Marks) (b) Figure 1 shows one of the defects which can be happened on the casting product. Explain causes of that defect and suggest one solution to prevent from the damage by sketching. [15 Marks) Shrinkage cavity likely Figure 1