Answer the following questions about the Ti$-$Al system, whose partial phase diagram is

shown below.

a$.$ Identify and determine the mass fraction of all components $35wt\%Al$ at $1300C.$

b$.$ Identify and determine the mass fraction of all components of $10wt\%Al$ at $800C.$

c$.$ Identify and determine the mass fraction of all components of $30wt\%Al$ at $1000C.$