10. An extruder has barrel diameter and length of 120 mm and 2.8 m, respectively. The screw rotational speed = 60 rev/min, channel depth = 6.5 mm, and flight angle = 17. The plastic melt has a shear viscosity = 200 Pa-s. Determine: (a) the extruder characteristic, (b) the shape factor Ks for a circular die opening with diameter = 3.5 mm and length = 12.5 mm, and (c) the operating point (Q and p).