Calculate the node voltages va vb and vc from the given

Question

V_s1 = 3 V
V_s2 = 15 V
V_s3 = 9 V
R₁ = 89 Ohm
R₂ = 80 Ohm
R₃ = 79 Ohm

Calculate the node voltages Va, Vb, and Vc from the given source voltages.
v_a = V,
v_b = V,
v_c = V

Use the above node voltages to calculate the assigned currents in the circuit.
I_R1= A,
I_R2 = A,
I_R3 = A

I_s1 =A,
I_s2= A,
I_s3 = A