I live in a residential building and use dominantly the 5ghz network. However, some of my iot devices, printers and TVs are still attached to the 2.4ghz network.

1. I would like to adjust the signal level of the 2.4ghz network and set it to the minimum, so my neighbors won't see it and it won't affect their auto-channel selection algorithms. 
2. I would like to force 2.4ghz to use 20 mhz, instead of 40/80.
3. I would like to be able to choose the channel of the 2.4ghz network.

TLDR; I want to be a good neighbor. Help me please?