Answer
a) A tulip can be red.
b) If 3 points are collinear, infinitely many planes intersect at the line.
c) $1\times3=3$
Work Step by Step
a) Since a tulip is a red flower, the conjecture is incorrect.
b) SInce more than one plane can pass through 3 collinear points, the conjecture is incorrect.
c) Since 3 is not divisible by 6, the conjecture is incorrect.