Consider this simple DFD diagram:

What type is it more likely to be: transform flow, or transaction flow? $[5$pts$]$

Map this DFD into a call$-$and$-$return tree like architecture, following the examples coved in "Lecture $16".$ Note: for simplicity purpose, you may

ignore the external entities and the data stores in the diagram $($things such as "customer" and "Database of sold items", etc.$)[$Spts$]$