If A (-2, 1) B (1 , 0), C (x , 3 ) and D (1, Y) are the vertices of a Parallelogram ABCD, then find the values of x and y.
If A (1,2), B (4, y), C (x,6) and D (3,5) are vertices of a parallelogram ABCD, find the values of x and y. [4 MARKS]