$6.($a$)$ For a creep test and the data provided below, schematically show the shear strain and stress behavior for both $\backslash (\backslash$sigma$\_\{1\}\backslash )$ and $\backslash (\backslash$sigma$\_\{2\}\backslash )$ Assume the stress was applied at time equal to zero.

$($b$)$ Identify $($label on the plot$)$ which of the five isochronal lines represents data for the shortest time duration.

$($c$)$ Draw on the isochronal figure how this short$-$duration isochronal line would shift if the temperature of the test was reduced.

$($d$)$ The material transitions to behaving in a non$-$linear viscoelastic response at $\backslash (\backslash$sigma$\_\{3\}\backslash )$ sketch what his part of the curve would look like for the middle$-$time dataset.

e$)$ What is the meaning of the slope of each line on the isochronal plot $(5$ words or less$)$: Shear Strain $1$ Data

Shear Strain $2$ Data