Q1. The following graph describes the motion of a girl going to meet her friend who stays 50 m from her house.
                 
       (a) How much time she takes to reach her friend's house ?

       (b) What is the distance travelled by the girl during the time interval 0 to 12 min?

       (c) During which time interval she is moving towards her house?

       (d) For how many minutes she was at rest, during the entire journey?

       (e) Calculate the speed by which she returned house.