I'm unable to install numpy and some others because libblas.so.3 cannot be found. I suspect that this has to do with various other problems I've been having doing these labs (such as the python version problem in lab 5. At this point, I don't think I can do much regarding these problems because I don't have a way to reflash the microSD card, and I don't know if my version of Raspberry Pi (2 B+) is causing any of the problems I'm facing. Perhaps in the future, when I get more money, this can be resolved because then I could afford to buy another Pi, a microSD card reader/writer, etc. But for now, I don't really know what to do.

I will say though, I have used the relevant python modules/packages before in other applications. For example, I've used matplotlib with numpy and scipy a lot while doing image processing. Numpy and scipy were used to hold image data and do matrix operations, and matplotlib was used to display images, graphs, and histograms. I've used both TensorFlow and Keras in the past to varying degrees, too.