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:
| Year | Class | Team | Points | Rank | Wins |
| --- | --- | --- | --- | --- | --- |
| 1972.0 | 125cc | Aermacchi | 2.0 | 38th | 0.0 |
| 1972.0 | 350cc | Aermacchi | 3.0 | 30th | 0.0 |
| 1973.0 | 250cc | Harley Davidson | 45.0 | 5th | 0.0 |
| 1973.0 | 350cc | Harley Davidson | 4.0 | 34th | 0.0 |
| 1973.0 | 500cc | Harley Davidson | 6.0 | 28th | 0.0 |
| 1974.0 | 250cc | Harley Davidson | 21.0 | 9th | 0.0 |
| 1974.0 | 350cc | Harley Davidson | 25.0 | 7th | 0.0 |
| 1974.0 | 500cc | Harley Davidson | 14.0 | 16th | 0.0 |
| 1975.0 | 250cc | Harley Davidson | 76.0 | 2nd | 2.0 |
| 1975.0 | 500cc | Harley Davidson | 4.0 | 28th | 0.0 |
| 1976.0 | 500cc | Suzuki | 16.0 | 14th | 0.0 |
| 1977.0 | 250cc | Yamaha | 5.0 | 27th | 0.0 |
| 1977.0 | 350cc | Yamaha | 50.0 | 4th | 1.0 |
| 1977.0 | 500cc | Suzuki | 21.0 | 13th | 0.0 |
| 1978.0 | 350cc | Yamaha | 47.0 | 6th | 0.0 |
| 1978.0 | 500cc | Suzuki | 23.0 | 10th | 0.0 |
| 1979.0 | 350cc | Yamaha | 10.0 | 17th | 0.0 |
| 1979.0 | 500cc | Suzuki | 16.0 | 15th | 0.0 |
| 1980.0 | 500cc | Suzuki | 4.0 | 17th | 0.0 |
| 1981.0 | 350cc | Yamaha | 1.0 | 32nd | 0.0 |
Question:
Which class has a rank of 5th?
Answer:
250cc