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:
| # | Title | Artist | Highest pos. reached | weeks at No. 1 |
| --- | --- | --- | --- | --- |
| 1. | "Don't Cry for Me Argentina" | Julie Covington | 1 | 7 |
| 2. | "The Way You That You Do It" | Pussyfoot | 1 | 7 |
| 3. | "I Just Want to Be Your Everything" | Andy Gibb | 1 | 7 |
| 4. | "That's Rock and Roll" | Shaun Cassidy | 2 |  |
| 5. | "Living Next Door to Alice" | Smokie | 2 |  |
| 6. | "I Go To Rio" | Peter Allen | 1 | 5 |
| 7. | "Torn Between Two Lovers" | Mary McGregor | 1 | 4 |
| 8. | "Walk Right In" | Dr Hook | 1 | 5 |
| 9. | "You're Moving Out Today" | Carole Bayer Sager | 1 | 4 |
| 10. | "If You Leave Me Now" | Chicago | 1 | 5 (pkd #1 in 76 & 77) |
| 11. | "Don't Give Up on Us" | David Soul | 1 | 3 |
| 12. | "Lido Shuffle" / "What Can I Say" | Boz Scaggs | 2 |  |
| 13. | "You and Me" | Alice Cooper | 2 |  |
| 14. | "Dance Little Lady Dance" | Tina Charles | 4 |  |
| 15. | "When I Need You" | Leo Sayer | 8 |  |
| 16. | "Don't Fall in Love" | Ferrets | 2 |  |
| 17. | "I Feel Love" | Donna Summer | 1 | 1 |
| 18. | "Help is on its Way" | Little River Band | 1 | 1 |
| 19. | "You Gotta Get Up and Dance" | Supercharge | 3 |  |
| 20. | "Mull of Kintyre" | Wings | 1 | 11 (pkd #1 in 77 & 78) |
| 21. | "Don't Leave Me This Way" | Thelma Houston | 6 |  |
| 22. | "Ain't Gonna Bump No More with No Big Fat Woman" | Joe Tex | 2 |  |
| 23. | "You're in My Heart" | Rod Stewart | 1 | 1 |
| 24. | "Ma Baker" | Boney M | 5 |  |
| 25. | "Lucille" | Kenny Rogers | 7 |  |
Question:
which three artists had a single at number 1 for at least 7 weeks on the australian singles charts in 1977?
Answer:
Julie Covington, Pussyfoot, Andy Gibb