Refer to the Figure

Refer to the figure.
Figure 1
You are studying a river in its natural state, unaffected by human activities. Your data are graphed in Figure 1. You began collecting data at the source of the river ("0 km" on the figure) and continued to sample the river every 1 km.
-Answer the following questions:
a) At what distance from the source is the river water moving the fastest?
b) At what distance from the source is the river water moving the slowest?
c) At what distance from the source is the river the deepest?
d) At what distance from the source is the river the shallowest?
e) Where is the river most likely flowing over the steepest terrain?
f) Where is the river most likely flowing over the most level terrain?