Sound waves travel at 300 m/s. Sound produced at a point is heard by a person after 5 seconds while the same sound is heard by another person after 6 seconds. What could be the maximum and minimum distance between the two persons? `1. 8\ k m ,\ 0. 15\ k m` b. `2. 2\ k m ,\ 0. 20\ k m` c. `2. 8\ k m ,\ 0. 25\ k m` d. `3. 3\ k m ,\ 0. 3\ k m`