What is the name of such a graph and how to store it in the database?

Question

Data Structures

Context: a graph for describing a business process.

spoiler

Старая версия

Answer 1

directed graph.
in the database, the easiest way is to store in the form of an adjacency list the
id of the vertex from which the edge comes out - the id of the vertex to which the edge comes.
store any additional information about vertices in another table/tables (depending on the structure of this information)

Answer 2

It is a planar directed graph with 5 vertices and 5 edges.

Answer 3

Acyclic.