I recently read that, on average, 10 different species on Earth go extinct each year.

(a) What is the probability no species go extinct next year? [WISE]

(b) An animal rights organization labels a year as "disastrous" if 4 or more species are lost that year. What is the probability of a "disastrous" year?

(c) A newspaper has asked you to make a statement of the form: "Next year, the Earth will most likely lose either m different species or n different species." What values should you give for m and n? Use R to help, if you wish.

(d) What value must we change the number 10 to in order for the answer in part a to get doubled? Give an exact answer, not a decimal.