I need to solve this question using nodal analysis, but I'm not sure what to do with that current source right there. I could only find I1 = 1A, which I think it's the right answer. Using the EveryCircuit app I found I2 = 2A, I3 = 500mA, I4 = 3.5A and I5 = 2.5A, but I just can't figure out how to find the answers Can you guys help me find the right equations?