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sufficient that berries not be ripe along the trail and for grizzly bears not to have been seen in the area."

where:

p:Grizzly bears have been seen in the area.

qiking is safe on the trail.

r:Berries are ripe along the trail.

I wrote my answer as [itex](\neg r \wedge \neg p)\rightarrow q[/itex]

But the answer is (q→(¬r∧¬p))∧¬((¬r∧¬p)→q)

I honestly don't see this as being the answer. Please help.