Kirchoff's first law -
- wherein
Apply Kcl at Q
I6+I3 = I1+ I2 .........(1)
I1 = 0.3A
I4 = 0.8A
I5 = 0.4A
KCL at 5
I4= I5 +I3
I3 = I4 - I5
= 0.8 +0.4
=0.4A
KCL at R
I1+I2 = I4
I2 = I4 - I1
= 0.8 - (-0.3)
=1.1A
From equation (1)
I6 + I3 = I1+ I2
I6 = I1 + I2 - I3
= -0.3+1.1 -0.4
=0.4A
I2 = 1.1A
I3 = 0.4A
I6 = 0.4A