can anyone help me solve the following:<BR><BR>Let R = {X, Y, A, B} and let Z be {Y, A}. Fill in the table below, adding whatever tuples you like, in such a way that the resulting relation respects X -&#062;&#062; Y but does not respect X -&#062;&#062; Z. Do you think that it is possible to fill in the table so that, additionally, the relation respects Y -&#062;&#062;Z ?.<BR><BR>X Y A B<BR>--------------------------<BR>x1 y1 a1 b1<BR> <BR> <BR> <BR> <BR><BR><BR>