Please I need a full answer to the following question quickly:

I need examples from real life about how to use each of these clustering methods:

I need examples to give me the data we want to apply each clustering method on it, is it about what? For, example it is about students' grades, then explain how to use the clustering method with it.

1-Partitioning methods.

2-Hierarchical methods.

3-Density-based methods.

4-Grid-based methods.

Please no handwritten answer, it is for the Data Mining subject

Thanks in advance