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:
| Callsign | Area served | Frequency | Band | On-air ID | Purpose |
| --- | --- | --- | --- | --- | --- |
| 6AAY | Albany | 0 95.3 | FM | Hot FM | Commercial |
| 6ABCFM | Western Australia | various | FM | ABC Classic FM | National |
| 6ABCRN | Western Australia | various | FM | ABC Radio National | National |
| 6ABCRR | Western Australia | various | FM | ABC Local Radio | National |
| 6ACR | Remote Aboriginal communities | various | FM | National Indigenous Radio Service | Community |
| 6AL | Albany | 0 630 | AM | ABC South Coast | National |
| 6AM | Northam | 0 864 | AM | Radio West | Commercial |
| 6BAY | Geraldton | 0 98.1 | FM | Spirit | Commercial |
| 6BE | Broome | 0 675 | AM | ABC Kimberley | National |
| 6BET | Bridgetown | 100.5 | FM | Hot FM | Commercial |
| 6BR | Bridgetown | 1044 | AM | ABC South West | National |
| 6BS | Busselton / Bunbury | 0 684 | AM | ABC South West | National |
| 6BUN | Bunbury | 0 95.7 | FM | Hot FM | Commercial |
| 6BY | Bridgetown | 0 900 | AM | Radio West | Commercial |
| 6CA | Carnarvon | 0 846 | AM | ABC North West | National |
| 6CAR | Carnarvon | 0 99.7 | FM | Hot Hits 99.7 | Commercial |
| 6CCR | Fremantle | 107.9 | FM | Radio Fremantle | Community |
| 6CI | Collie | 1134 | AM | Radio West | Commercial |
| 6CKI | Cocos Islands | 0 96 | FM | VKW | Community |
| 6CRA | Albany | 100.9 | FM | 100.9 FM | Community |
| 6CST | Mandurah | 0 97.3 | FM | Coast FM | Commercial |
| 6DB | Derby | 0 873 | AM | ABC Kimberley | National |
| 6DBY | Derby | 0 97.9 | FM | 6DBY | Community |
| 6DL | Dalwallinu | 0 531 | AM | ABC Midwest & Wheatbelt | National |
| 6EBA | Perth | 0 95.3 | FM | 6EBA | Community |
| 6ED | Esperance | 0 837 | AM | ABC Esperance | National |
| 6EL | Bunbury | 0 621 | AM | Spirit | Commercial |
| 6ESP | Esperance | 103.9 | FM | Hope FM | Community |
| 6FMS | Remote Commercial Radio Service Western Zone | various | FM | Red FM | Commercial |
| 6FX | Fitzroy Crossing | 0 936 | AM | 6FX | Community |
| 6GF | Kalgoorlie | 0 648 | AM | ABC Goldfields | National |
| 6GGG | Geraldton | 0 96.5 | FM | WAFM | Commercial |
| 6GME | Broome | 0 99.7 | FM | Radio Goolarri | Community |
| 6GN | Geraldton | 0 828 | AM | ABC Midwest & Wheatbelt | National |
| 6HED | Port Hedland | 0 91.7 | FM | WAFM | Commercial |
| 6HFM | Armadale | 107.3 | FM | Heritage FM | Community |
| 6IX | Perth | 1080 | AM | 6iX | Commercial |
| 6JJJ | Western Australia | various | FM | Triple J | National |
| 6KA | Karratha | 1260 | AM | Spirit | Commercial |
| 6KAN | Katanning | 0 94.9 | FM | Hot FM | Commercial |
| 6KAR | Kalgoorlie | 0 97.9 | FM | Hot FM | Commercial |
| 6KCR | Kalamunda | 102.5 | FM | KCR FM | Community |
| 6KG | Kalgoorlie | 0 981 | AM | Radio West | Commercial |
| 6KP | Karratha | 0 702 | AM | ABC North West | National |
| 6KW | Kununurra | 0 819 | AM | ABC Kimberley | National |
| 6LN | Carnarvon | 0 666 | AM | Classic Hits 666 | Commercial |
| 6MD | Merredin | 1098 | AM | Radio West | Commercial |
| 6MER | Merredin | 105.1 | FM | Hot FM | Commercial |
| 6MIX | Perth | 0 94.5 | FM | Mix 94.5 | Commercial |
| 6MJ | Manjimup | 0 738 | AM | ABC South West | National |
| 6MKA | Meekatharra | 0 98.3 | FM | Meeka FM | Community |
| 6MM | Mandurah | 1116 | AM | 6MM | Commercial |
| 6MN | Newman | 0 567 | AM | ABC North West | National |
| 6NA | Narrogin | 0 918 | AM | Radio West | Commercial |
| 6NAM | Northam | 0 96.5 | FM | Hot FM | Commercial |
| 6NAN | Narrogin | 100.5 | FM | Hot FM | Commercial |
| 6NEW | Newman | 0 92.9 | FM | 6NEW | Community |
| 6NM | Northam | 1215 | AM | ABC Midwest & Wheatbelt | National |
| 6NME | Perth | 100.9 | FM | Noongar Radio | Community |
| 6NOW | Perth | 0 96.1 | FM | 96fm | Commercial |
| 6NR | Perth | 100.1 | FM | Curtin FM | Community |
| 6NW | Port Hedland | 1026 | AM | Spirit | Commercial |
| 6PB | Western Australia | various | AM | ABC NewsRadio | National |
| 6PER | Perth | 0 93.7 | FM | Nova 93.7 | Commercial |
| 6PH | Port Hedland | 0 603 | AM | ABC North West | National |
| 6PN | Pannawonica | 0 567 | AM | ABC North West | National |
| 6PNN | Western Australia | various | FM | ABC NewsRadio | National |
| 6PPM | Perth | 0 92.9 | FM | 92.9 | Commercial |
| 6PR | Perth | 0 882 | AM | 6PR | Commercial |
| 6PRK | Halls Creek | 0 98.1 | FM | 6PRK | Community |
| 6PU | Paraburdoo | 0 567 | AM | ABC North West | National |
| 6RCI | Christmas Island | 105.3 & 102.1 | FM | 6RCI | Community |
| 6RED | Karratha | 106.5 | FM | WAFM | Commercial |
| 6RN | Western Australia | various | AM | ABC Radio National | National |
| 6RPH | Perth | 0 990 | AM | 6RPH | Community |
| 6RTR | Perth | 0 92.1 | FM | RTR FM | Community |
| 6SAT | Remote Commercial Radio Service Western Zone | various | FM | Spirit | Commercial |
| 6SBSFM | Perth | 0 96.9 | FM | SBS Radio | National |
| 6SE | Esperance | 0 747 | AM | Radio West | Commercial |
| 6SEA | Esperance | 102.3 | FM | Hot FM | Commercial |
| 6SEN | Perth | 101.7 | FM | Capital 101.7 FM | Community |
| 6SON | Perth | 0 98.5 | FM | Sonshine FM | Community |
| 6TCR | Wanneroo | 0 89.7 | FM | 89.7 FM | Community |
| 6TJR | Toodyay | 105.3 | FM | 105.3 FM | Community |
| 6TP | Tom Price | 0 567 | AM | ABC North West | National |
| 6TTT | Geraldton | 0 97.3 | FM | Soncity FM | Community |
| 6TZ | Bunbury | 0 963 | AM | Radio West | Commercial |
| 6VA | Albany | 0 783 | AM | Radio West | Commercial |
| 6WA | Wagin | 0 558 | AM | ABC Great Southern | National |
| 6WB | Katanning | 1071 | AM | Radio West | Commercial |
| 6WF | Perth | 0 720 | AM | ABC Perth | National |
| 6WH | Wyndham | 1017 | AM | ABC Kimberley | National |
| 6WR | Kununurra | 0 693 | AM | 6WR | Community |
| 6WSM | Fremantle | 0 91.3 | FM | Sport FM | Community |
| 6XM | Exmouth | 1188 | AM | ABC North West | National |
| 6YCR | York | 101.3 | FM | York FM | Community |
Question:
Band of am, and a Callsign of 6wh has what purpose?
Answer:
National