Suppose, my q bar is given by k squ

Suppose, my q bar is given by k square x j hat minus y i hat divided by x square plus y square where k is a constant. Here, it is independent of z component, so the velocity, so w is since it is not mentioned about z components. We can always say w is equal to 0, in this case, so the motion of, so the existence of for these velocity of the q, so the existence of a fluid motion (no audio from 26:59 to 27:08).