A velocity field is presented that can be approximated by the following expression: 1+ cos(t)' V = 1 i+ e(1+sen(t) (a) Classify the presented flow. Calculate (b) The lines of trajectory of the particle passing through the point (1,1) at t = 1 s. c) The streamline resting on the point (1,1) at t = 1 s. d) The equation of the lines of smoke passing through the point (1,1) at t = 1 s.