(1) (2) What is the blue component noted by (1) above? O Exothermic Sleeve Chill Bar O Filter O Chaplet Core (1) (2) What is the proper type of porosity for samples (1) and (2) above? O (1): Shrinkage; (2): Gas O (1): Gas; (2) Shrinkage Recall: t=C (V/A)? Casting B: Surface Area = 100 in? Casting A: Surface Area = 120 in? Volume = 50 in Volume = 50 in Both castings were cast using the same metal and mold type. Which casting above will require a smaller riser? O Casting A O Casting B