Do small tasks in Matlab

We need a specialist in Matlab. You need to do 4 small tasks for the university in Matlab, each with an example of performing a similar task from a teacher.
Example: find the 10 smallest eigenvalues of a square sparse matrix of dimensionality
Solving each task – 20-30 lines in matlab
In the task, the archive in which 4 tasks with examples, in each you need to perform 1 option.