4. Complete the tables below and make representative figures for a polymer undergoing bulk hydrolytic degradation and a polymer undergoing surface hydrolytic degradation. In both cases, a 1 cm cube of material is placed in 20 mL of saline at 37 C for 28 days. For each polymer, explain why you chose these values based on the mechanism of degradation. Please use graphs and/or diagrams to aid your explanation for full credit. a) Polymer undergoing bulk degradation Day % Mass Loss Ultimate Tensile Strength 0 0 100 kPa 7 14 21 28 100 0 kPa b) Polymer undergoing surface degradation % Mass Loss Day Ultimate Tensile Strength 0 0 100 kPa 7 14 21 28 100 O KPa 4. Complete the tables below and make representative figures for a polymer undergoing bulk hydrolytic degradation and a polymer undergoing surface hydrolytic degradation. In both cases, a 1 cm cube of material is placed in 20 mL of saline at 37 C for 28 days. For each polymer, explain why you chose these values based on the mechanism of degradation. Please use graphs and/or diagrams to aid your explanation for full credit. a) Polymer undergoing bulk degradation Day % Mass Loss Ultimate Tensile Strength 0 0 100 kPa 7 14 21 28 100 0 kPa b) Polymer undergoing surface degradation % Mass Loss Day Ultimate Tensile Strength 0 0 100 kPa 7 14 21 28 100 O KPa