The switch has been opened for a long time. On t=0 the switch is conected. Find the current through R2 for t>=0, the values for R1, R2, R3, E, C are given

Hi guys, hope you can help me.

I need to find the current through R2, what are my options?

I think I could say ir2=ic+i1 where ic is the current on the capacitor, which think could find with no problem, nevertheless which would be i1?

Thanks in advance for any help.