For a $\backslash (0\mathrm{.}37\backslash$mathrm$\{$wt$\}\backslash \%\backslash$mathrm$\{$C$\}\backslash )$ nickel steel plate, show any calculations to support your responses to the following queries:

A$.$ After pouring the melt into a refractory container and allowed to furnace cool to $\backslash (728^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ),$ calculate the fractional amounts of the equilibrated phases formed within a plate.

B$.$ For a steel with the attached time$-$temperature$-$transformation $($TTT$)$ diagram, give the processing of three steel items $-$ one plate with a microstructure of $\backslash (25\backslash \%\backslash )$ pearlite, another plate of $\backslash (100\backslash \%\backslash )$ martensite, and the third plate with $\backslash (75\backslash \%\backslash )$ upper bainite.

C$.$ For $2$ B and $2$ C $,$ sketch carefully each microstructure expected for the four plates with all the phases identified with their corresponding temperatures.