4. Determine the value of 'p'

If the area of the quadrilateral joining the vertices  \(A (-11, p)\), \(B (-4, -4)\), \(C (7, -4)\) and \(D (3, 8)\) taken in order is 143 square units, then determine the value of \(p\).

 

Answer:

 

The value of \(p\) is .