1) Let P, Q, and R be the propositions
P : Grizzly bears have been seen in the area.
Q : Hiking is safe on the trail.
R : Berries are ripe along the trail.
Write these propositions using p, q, and r and logical connectives (including
negations).
a) Berries are ripe along the trail, but grizzly bears have not been seen in the
area.
b) Grizzly bears have not been seen in the area and hiking on the trail is safe,
but berries are ripe along the trail.
c) If berries are ripe along the trail, hiking is safe if and only if grizzly bears
have not been seen in the area.