school management

hello I have the source code of a web application and I would like to make changes

1- is it possible to create subjets by group? for example group Science=(Mathematics,Physics,chemistry,biology) art=(french,english,history)
2- if possible display the rank by subject and average
3- to the new notes I would like to add the coefficient

What does coef mean?

all disciplines do not have the same importance depending on the series chosen by a student. to materialize it,
the teachers assigned coefficients to each subject.
Thus, the higher the coefficient of a subject, the more important it is for that class.
After each assessment, a student's mark is put out of 20,
then multiplied by his coefficient to calculate his overall average.

Coefficient is:

A number used to multiply a variable.
Example: 6z means 6 times z, and "z" is a variable, so 6 is a coefficient.

3- finaly the most important is it possible to have a bulletin similar to this one?

sample bulletin we want to have

https://prnt.sc/uABfjGHcdqC2
or
https://prnt.sc/buLbhLr_JIsn


here is what i have now

https://prnt.sc/rPWwibf9hDzT