graph

I have trouble solving the following question related to signals and systems, and I need to plot its graph: (2t/5) * [u(t) - u(t-6)] The tools provide a solution, but I want to understand the logic behind how it is plotted. If anyone knows and can help, it would be greatly appreciated. thanks..

Here is the i (graph a) and i^2 graph (graph b) for the RMS calculation: My question is while calculating RMS value, should I decide to determine the period by looking a) or b) graph? Because, while I'm looking for the a. graph (shown above), I guessed the period is 2pi However, if I would...