Comments on Assignment 5

1. This assignment was done much better compared to the last one.
   Some common errors are:
   • - page 127 #33: students did not show the general form of B
   • - page 126 #8, #16: many students did not write the reason from one step to the next ("by definition of ...", "by theorem...", etc.)
   • - for matrices in general, students often forgot or added an extra minus sign when writing the next matrix