Using the Animated Figure 9.8, for an alloy of composition 25 wt% Sn - 75 wt% Pb, select the phase(s) present and their composition(s) at 200°C.
α = 17 wt% Sn - 83 wt% Pb; β = 55.7 wt% Sn - 44.3 wt% P
L = 25 wt% Sn - 75 wt% Pb; α = 25 wt% Sn - 75 wt% Pb
α = 17 wt% Sn - 83 wt% Pb; L = 55.7 wt% Sn - 44.3 wt% Pb
α = 18.3 wt% Sn - 81.7 wt% Pb; β = 97.8 wt% Sn - 2.2 wt% Pb