The observed elongation$-$time diagram of a creep test can be seen above. During the test various

microstructure investigated on workpiece material and figures A$,$ B$,$ C$,$ and D shows the schematic view of

microstructural degradation and scanning electron microscope $($SEM$)$ images of the structure.

On elongation$-$time diagram, label and show the regions $($clearly indicate$)$ for microstructure A$,$ B$,$ C$,$ and D$.$

Explain and discuss why did you select that region. Also explain the main properties of the regions observed

on elongation$-$time diagram. $(40$ pts$)$