Commutation process in RLC circuit

[karlis123]

Homework Statement

Still can't figure this one out.
All data is on the picture attached.
I have to find the current flowing through E1 after E2 is connected and draw a graph as it changes in time of the process.

I can't do the equations when t=0

Homework Equations

dUc/dt|t=0 =i3(0)/C

The Attempt at a Solution

t=0
i2-i5=i3+i6
L*di2/dt +Uc-R2*i6+r1*i5=E2
Uc-R1*i5=E1-E2
i still miss something, any help would be apritiated

 

[karlis123]

here I have found an example with the equations when t=0