On this diagram for the Al$-$Ni system $($Page $2),$

a$.$ How many eutectic points are there in the Al$-$Ni phase diagram?

b$.$ How many eutectoid points?

c$.$ How many peritectics?

d$.$ How many pure metal phase transitions, e$.$g$.$ melting?

e$.$ How many congruent melting points?

f$.$ How many intermetallic compounds?

Locate and label clearly $-$

g$.$ A solidus

h$.$ A liquidus

i$.$ A solvus

j$.$ The two$-$phase field with AlNi and AlNi $3$

k$.$ The two$-$phase field with liquid and $A{l}_{3}N{i}_2$

A eutectic transformation $($write the reaction$)$

m$.$ A peritectic transformation $($write the reaction$)$

n$.$ If you have liquid that has $50$ atomic $Ni$ in the presence of AlNi,

what is the temperature?

o$.$ If you have liquid that has $50$ weight: Ni in the presence of AlNi,

what is the temperature?

p$.$ Which is more dense, Ni or Al$?$ How do you know?