I’m really struggling to understand KCL problems. My main issue is a visual one; I just can’t un ...

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I’m really struggling to understand KCL problems. My main issue is a visual one; I just can’t understand where a junction starts and ends, or when the current enters and leaves a junction. I also confuse junctions with branches, and because of this, I’m unsure how to write the equations needed to find the currents. The last problem in the document is especially confusing to me. I really need a simple, step-by-step explanation, almost like I’m being taught like a child, on how to approach these problems. I need to understand what I'm looking at and what the arrows mean.