2.12 Consider the flow field V =axti+bj, where a=1 4 s−2 and b=1 3m s. Coordinates are measured in meters. For the particle that passes through the point x,y = 1,2 at the instant t =0, plot the pathline during the time interval from t =0 to 3 s. Compare this pathline with the streakline through the same point at the instant t =3 s.