exe08 Useful link: https://cran.r-project.org/web/packages/rstan/vignettes/rstan.html https://mc-stan.org/loo/articles/loo2-example.html https://github.com/avehtari/BDA_R_demos/blob/d3b9a6c0914764573d0b97830ab47cddb00e6dab/demos_rstan/lin.stan https://mc-stan.org/users/documentation/ stan introduction