[![regulator circuit](https://i.stack.imgur.com/tGWEd.png)](https://i.stack.imgur.com/tGWEd.png)

The final goal is to have an output (u0) of 22 V. The only information given is the uBE value of 0.7 V and the maximum load current of 1 A.

I'm having a hard time determining basically every value involved in this circuit. It would be nice if someone could at least tell me where to start analyzing or something like that, since I can't find a circuit that looks like this anywhere.