The extruder head in a fused-deposition modeling setup has a diameter of 1.25 mm (0.05 in) and produces layers that our 0.25 mm (0.01 in) thick. a. If the extruder head and polymer extrudate velocities are both 50 mm/s, estimate the production time for the generation of a 38 mm (1.5 in) solid cube. Assume that there is a 10-second delay between layers as the extruder head is moved over a wire brush for cleaning. b. Assuming that the porosity for the support material is 50%, calculated the production rate for making a 100 mm (4 in) high cup with an outside diameter of 90 mm (3.5 in) and a wall thickness of 4 mm (0.16 in). Consider the cases with 1) the closed end up and 2) the closed end down.