Hi 
how can I install ( g+±4.7 and bcc-4.7 and gfortran -4.7 )
Please i need help🙏
You should mention the problem you are trying to solve. If you need access to old compilers you should consider installing a distro that provides the required compilers (often this is done using a VM). Ubuntu forums may be more helpful.
May be it will be helpful. Please check this link.
https://askubuntu.com/questions/1406962/install-gcc7-on-ubuntu-22-04