Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Week | Date | Opponent | Result | Attendance |
| --- | --- | --- | --- | --- |
| 1.0 | August 4, 1972 | at Los Angeles Rams | L 13–3 | 64803.0 |
| 2.0 | August 13, 1972 | at San Francisco 49ers | L 20–13 | 58364.0 |
| 3.0 | August 20, 1972 | at Detroit Lions | L 34–7 | 58422.0 |
| 4.0 | August 26, 1972 | Minnesota Vikings | L 20–17 | 70583.0 |
| 5.0 | September 3, 1972 | vs. Cincinnati Bengals at Columbus, Ohio | L 27–21 | 84816.0 |
| 6.0 | September 10, 1972 | at New York Giants | L 27–13 | 60152.0 |
Question:
What is the date of week 4?
Answer:
August 26, 1972