Table:
|  | Number of options | Weighted-Average Exercise Price |
| --- | --- | --- |
|  | (in thousands) |  |
| Outstanding and Exercisable at December 31, 2018 | 543 | $27.46 |
| Exercised | (6) | 11.38 |
| Forfeited/Expired | (68) | 24.78 |
| Outstanding and Exercisable at December 31, 2019 | 469 | 28.04 |
Paragraphs:
Stock Options
The following table summarizes activity involving stock option awards for the year ended December 31, 2019:
The aggregate intrinsic value of our options outstanding and exercisable at December 31, 2019 was less than $1 million. The weighted-average remaining contractual term for such options was 0.18 years.
During 2019, we received net cash proceeds of less than $1 million in connection with our option exercises. The tax benefit realized from these exercises was less than $1 million. The total intrinsic value of options exercised for the years ended December 31, 2019, 2018 and 2017, was less than $1 million each year.
Question:
What are the activity types involving stock option awards?
Answer: Exercised, Forfeited/Expired