(Solved): Below is shown a hypothetical phase diagram for metals A and B between 200C and 1200C. Which ...

Below is shown a hypothetical phase diagram for metals $A$ and $B$ between $200^{\circ }\mathrm{C}$ and $1200^{\circ }\mathrm{C}$. Which of the following statements are correct? (Choose all that apply.) The intermetallic compound $AB$ exists at a composition of 70 wt $\%\mathrm{B}-30$ wt $\%\mathrm{A}$, and melts congruently at $725^{\circ }\mathrm{C}$. The solubility of $A$ in $B$ is negligible at all temperatures. The melting temperature of metal $\mathrm{A}$ is $1075^{\circ }\mathrm{C}$. The solubility of $B$ in $A$ is not negligible at all temperatures. A eutectic occurs at $450^{\circ }\mathrm{C}$ and 90 wt $\%\mathrm{B}-10$ wt $\%\mathrm{A}$. The melting temperature of metal $B$ is $570^{\circ }\mathrm{C}$. A eutectic occurs at $550^{\circ }\mathrm{C}$ and 35 wt $\%$ B- 65 wt $\%$ A.