I'm now getting the following error message (shown below)
It states that I can't install r-cran-stan b/c I don't have r-cran-v8
In trying to install r-cran-v8 it states that I don't have libnode64 and it won't let me install libnode64

See below error message:

chammo20@DESKTOP-BB7NQKM:~$ sudo apt install -y r-cran-rstan r-cran-shinystan
[sudo] password for chammo20:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
r-cran-rstan : Depends: r-cran-v8 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
chammo20@DESKTOP-BB7NQKM:~$ sudo apt install -y r-cran-v8 r-cran-rstan r-cran-shinystan
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
r-cran-v8 : Depends: libnode64 but it is not installable
E: Unable to correct problems, you have held broken packages.
chammo20@DESKTOP-BB7NQKM:~$ sudo apt install -y libnode64 r-cran-v8 r-cran-rstan r-cran-shinystan
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libnode64 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libnode64' has no installation candidate