charpy impact test help

invincible1

hey guys i need help charpy impact test. i have attached my graph with the results we had. Does this seem correct? from the graph how do i determine the transition temperature T1 for the material where T1 is normally defined as the temperature corresponding to 50% of energy change between the upper and lower plateaux of the energy curve
and also determine a temperature T2 corresponding to 50% crystallinity change.
Please help

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