System flowchart digram? DFD data flow digram? E-R diagram? program flowchart diagram?

e-r-diagram
dfd-data

#1

school login:
user name:…
password:…

role :
a- for teacher
b-for parent
c- for student
d- for administartor

Question:

1- system flowchart digram?
2- DFD data flow digram?
3- E-R diagram?
4- program flowchart diagram?

image

Answer: