The company you work for makes the casting for the rectangular pan (300 mm long x 200 mm wide x 60 mm deep with a 3 mm thick walls and base). The handles are added in a secondary process. A new model (400 x 250 x 70 mm) with 4 mm wall thickness is in design. 1. Assume n=2 and estimate the relative solidification time compared to the current model (show work) 2. The sales director wants to "modernize the design by making all the corners "sharp" and the walls "flat". Is that a good idea? Why?