The document contains individual assignments on linear algebra topics. These include solving systems of equations, vector operations, and geometric problems. To proceed, could you let me know:

1. Which specific problem do you want help with? (e.g., Task 1, Task 2, etc.)
2. The value of $N$, which is used as a parameter in the problems, or guidance on how it can be determined.

Once I have this information, I can begin solving or explaining the chosen tasks. Let me know how you'd like to proceed!