A hot air balloon travels with the wind. The wind velocity is V=6i + 10j m/s for the first hour and then it is 10i + 5j m/s for 2 hours. In Cartesian coordinates. Sketch the pathline of the balloon and streamlines at t=2 hrs. If a number of the hot air balloons started from the same location, sketch the streakline formed by the balloon at t=3hrs. The balloons start at the origin.