1) Cling film (stretch film) materials (POE/POP) and Aluminium 7050 have similar toughness values. However, their behavior differs in crack-resistance-limited conditions. For example, separating cling film by hand without a knife is hard. Does fracture toughness or toughness play a more critical role? To address this query, create a graph contrasting Fracture Toughness vs Toughness. Then, on the plot, label the three distinct materials below and discuss: a. Cling Film raw material: POE/POP (Ethylene-based, Shore A65) b. Metal: Aluminum 7050, wrought, T7651 Ceramic: Alumina (85)(410) In the graph, "Fracture toughness" should be selected at the y-axis. Since "toughness" is not available in the CES database, it will be calculated using the formula provided below: GC = Kc E Kc fracture toughness, Mpam E: Modulus of Elasticity, Gpa GC: Toughness, kJ/m You must add this formula by following the procedure. For the x-axis, click the "Advanced..." button instead of selecting a category. In the window that appears, enter the required formula for "toughness." Be careful about formula input; use the keypad within the software interface (i.e., not your computer's keyboard). You can only input the numbers using your computer's keyboard.