user: Question: What are the mhz when the profile is 8b?
Columns: ['Profile', 'Bandwidth ( MHz )', 'Number of carriers', 'Carrier bandwidth (kHz)', 'Power ( dBm )', 'Max. downstream throughput ( Mbit/s )']
Types: ['text', 'text', 'real', 'text', 'text', 'real']
Sample row: ['8a', '8.832', 2048.0, '4.3125', '+17.5', 50.0]
SQL:

assistant: SELECT "Bandwidth ( MHz )" FROM "Table" WHERE "Profile" = '8b';