Answer:
Only demonstrative due to lack of numerical info
Explanation:
To answer this question, you would need to know how long Jamie took to paddle downstream to the picnic area and how far she traveled, as well as how long she took to paddle upstream back to her campsite and how far she traveled. With this information, you can use the formula:
speed = distance / time
to calculate Jamie's paddling speed in still water and the speed of the river's current.
Without more information, it is not possible to determine Jamie's paddling speed in still water or the speed of the river's current.