A student becomes ill but has a friend who picks up supplies for them. The friend throws a bag of food from the ground to the student who safely leans out a window 6.30 m above the bag to catch it. If the friend stands 8.40 m from the building, a) What is the minimum velocity of the thrown bag to reach the student? b) How much time does it take for the bag to reach the student? c) What is the final velocity of the bag just before it is caught by the students?