QUESTION $8$

Using the diagram for Problem $7,$ answer the following questions:

What do Symbols $1$ and $2$ represent?

$-$What does the operation involving Symbols $3$ and $4$ depict?

$-$What does the operation involving Symbols $4$ and $5$ depict?

$-$What does the operation involving Symbols $6,8,$ and $9$ depict?

System Flowchart