In an experiment with 10,000 electrons, which land symmetrically on both sides of x = 0 cm, 5000 are detected in the range -1.0 cm ≤ x ≤ +1.0 cm, 7500 are detected in the range -2.0 cm ≤ x ≤ +2.0 cm, and all 10,000 are detected in the range -3.0 cm ≤ x ≤ +3.0 cm. Draw a graph of a probability density that is consistent with these data. (There may be more than one acceptable answer.)