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This may assist. via Stackexchange https://mathematica.stackexchange.com/questions/173070/rlink-no-longer-works-with-r-3-5-on-macos?rq=1 regards Gary
apologies for not including my details.
Patrik, your detailed reply is very helpful. In high school the purpose of the exercise is exploration within limits. These examples provide alternatives which can usefully be explored and verified by direct experiment. limits of theory and...