If the sides of a triangle $\triangle ABC$ are $7x-y… |

If the sides of a triangle $\triangle ABC$ are $7x-y-10=0$ , $10x+y-41=0$ , and $3x+2y+3=0$ then:
a. Find the vertices $A, B, C$ of the triangle.
b. Find the equations of altitudes of $\triangle ABC$ .
c. Show that the altitudes of $\triangle ABC$ are concurrent.
d. Find area of $\triangle ABC$ .