Question

what is the value of x and y

Answer 1

you know that diagonals of a parallelogram bisect each other
therefore ( (1+x)/2 , (6+2)/2 ) = ( (4+3)/2 , (y+5)/2 )

(1+x)/2 = (4+3)/2
x = 6

(6+2)/2 = (y+5)/2
y = 3