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$1.$ Fatigue Article Reading

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You are asked to read the attached article entitled "Accelerated Testing Based on a Mechanical $$ Damage Model".$$ As an example of the model application you are given the data below for a steel component.$$ The curves plotted are for three different values of R$.$ For the three curves you must determine the parameters of the law $($m$,$ A and b$).$ For this example we give you the value of b as $0\mathrm{.}54.$ Comment on whether the parameters of the law must be identical for the three curves.

Calculate, for the above example, the acceleration factor between accelerated$($R $=0\mathrm{.}5$ and smax $=100$ MPa$)$ and the given test conditions $($R $=0\mathrm{.}05$ and smax $=50).$