(Solved): Based on the lead-tin phase diagram, select from the following the phase(s) and their composition( ...

Based on the lead-tin phase diagram, select from the following the phase(s) and their composition(5) at \( 100^{\circ} \mathrm{C} \) for a lead-tin alloy of composition 25 wt\% Sn-75 wt\% Pb. \( \alpha=17 w t \% \mathrm{Sn}-83 \) wt\% Pb; L= 55.7 wt\% Sn-44.3 wt\% Pb \( \alpha=25 w t \% \mathrm{Sn}-75 w t \% \mathrm{~Pb} ; L=25 w t \% \mathrm{Sn}-75 w+\% \mathrm{~Pb} \) \( \alpha=5 v t \% \) Sn-95 wt\% Pb; \( \beta=98 \) wt \( \% \mathrm{Sn}-2 \mathrm{wt} \% \mathrm{~Pb} \) \( \alpha=18.3 w t \% \mathrm{Sn}-81.7 w t \% \mathrm{~Pb} ; \beta=97.8 \mathrm{wt} \% \mathrm{Sn}-2.2 \mathrm{wt} \% \mathrm{~Pb} \)