The video presenter mentions that R-naught refers to how easily the virus spreads "if there are no restrictions." What would you expect to happen to the R-naught value in the following instances: a) social distancing but no masks, b) social distancing with masks, c) all restrictions lifted after a long lockdown. In these cases would R-naught go up, down, or stay the same? Please explain & defend your answer.

What is one affect on the australian environment due to the introduction of non-native european rabbits? (a) more grass grew in response to the need of the growing population of rabbits. (b) the rabbits balance out the food chain as they became a natural prey to many predators. (c) the rabbits the land by digging, which caused the soil to spread much needed nutrients. (d) the rabbits out-competed other small animals species and caused them to go extinct.