Issue on Installing Ruby On Rails for specific version on Ubuntu 18.04

I had installed Ruby at the version of 2.7.0 and Gem at the version of 3.1.2 when I used the command " gem install rails " it shows an error like this..

ERROR: Loading command: install (LoadError) cannot load such file -- zlib ERROR: While executing gem ... (NoMethodError) undefined method `invoke_with_build_args' for nil:NilClass

Help me to find it..