AB= root number 5 1/ root number 5= root number 5/X X=5= 1+C point coordinates, so c (4,0).

D(Y, Z) (4-Y)/ radical number 5= 1/ radical number 5 so 4-Y= 1 Y=3.

1* 1+Z*Z= root number 5* root number 5 so Z=2 so d (3,2)