PO vs BA vs Dev Manager

We are a pretty new team, in a business that's now getting into our scale up & profitability. However we are still not all on the same page about the roles & responsibilities when it comes the end to end process of the "Solution" aka "Solutioning" or "Problem solving".

I'd be keen to hear everyone's thoughts on how the PO, BA & Dev Manager all work together, obviously the devs build the thing.

What are the roles, responsibilities, deliverables of and between: – Product Owner – Business Analyst – Development Manager

As much or as little detail as you feel

Many thanks