For a laser welding process of stainless steel 304 (r = 8030 kg/m3 , Cp = 500 J/kgC, and melting temperature Tm = 1,450C), use the lumped heat capacity model to plot penetration depth g in mm vs. welding speed v (mm/s) for 5 < v < 50 mm/s with increment of 5 mm/s. The laser power is 2 and 4 kW, reflection is 0.45, and weld width w is 3 mm. Also assume conduction heats account for 52% of the absorbed power.