**Wilson current mirror**problem to solve. I tried to do it but I am not sure if it is correct.

Here is the circuit:

The problem is to find (Ir/I), i.e. Currence Ir over currence I. It is assumed that all the transistors are equal: beta (currence amplification) is the same.

Here is my solution:

Image No.1:

Image No.2:

Image No.3: