a) Determine whether the velocity field & = 3ti +azj + tyK is incomprissible, and irrotational or notational b) Calculate the trajectory for the unsteady, two dimensional flow field given by U=_x 1+t v = y 1+26 Where the flow passes through point (xo, yo) at t = 0 a (C) Water at 36 m above sea levd has d. velocity of 18 m/s and pressure of 350 kPa. Determine the potential energy and to tal head. kinetic }