$(10\mathrm{.}53)$ Consider Gibbs Phase rule and using the diagrams in Chap $10$ in the book

and specify the number of degrees of freedom for the following alloys:

$($a$)95wt\%Ag-5wt\%Cu$ at $780C$

$($b$)80$ wt $\%Ni-20wt\%Cu$ at $1400C$

$($c$)44\mathrm{.}9wt\%Ti-55\mathrm{.}1wt\%Ni$ at $1310C$

$($d$)61\mathrm{.}9wt\%Sn-38\mathrm{.}1wt\%Pb$ at $183C$

$($e$)2\mathrm{.}5$ wt $\%C-97\mathrm{.}5wt\%Fe$ at $1000C$