Resubmitted ohm's law/resistors

Please only do problems 2.50, 2.54, 2.55, 2.56, 2.57, 2.58, 2.59, 2.62. 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!

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!

Resubmitted mesh

Please only do problems 3.33, 3.34, 3.38, 3.39, 3.40-3.46. 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! Please use pictures to show loops, how take apart, solve etc in a nice step by step flow to go through your help and redraw and see clearly at this beginners level please.

Sign convention

In problems 1-5 I am having problems learning sign convention. Please solve these problems and go throught each circuit and please explain why you chose the signs. For example voltage source is say 12V, but sometimes its negative, sometimes positive, then when we reach an element signs change again. Please do problem 6 explaining why you add an I, subtract an I. How the final equation comes together. Please solve problem 7 solve for Vo. Please explain each step. Give all numbers, equations etc for everything and solve step by step please.

Sign convention for power in electrical circuit

Please refer attachment.