Solving Circuit Theory Transient Analysis Task - Expert Input Needed (Image Attached)

Can anybody solve it?

Hi
Starting Condition Uc=0
Final Condition : Uc=ELP
Internal resistance for Transient after switch closure : Ri=(4R//4R//3R) R
Loop Current left = 3E/7R before closing the switch
Left Potential at switch = E- 4R*3E/7R = E(1-12/7) =ELP before closing the switch
Potential at closed switch
i1 left top i2 right top i3 left bottom i4 (C)=0
final i4=0
i1,-i2 = -2E/7R
u1=4R*-2E/7R
i3, -i2
u2= E/2
ELP =u1 u2
Current = ELP / Ri * -exp (-t/(TAU)) where TAU = C*Ri

It was a pleasure thanks to Kirchhoff
ndila