Resubmitted KCL, nodal analysis

Please only do review question 3.1 - 3.8 and problems 3.1 - 3.12.  OK PLEASE show all equations used, work and PLEASE do not skip steps no matter how minor.  I learn by example and need to see everything also including pictures of current flow, directions, picture of how each step progressed, etc..  Please just do not give an answer, I need to connect with everything that is going on to understand.  Even if some problems are close I need to see each way done to get better.  Thanks!

Also, please circle nodes and list as a, b, c, etc, go through each step showing pictures how things change.  This is vital for me now.  Thanks!