Consider the resource and mining stocks listed on the Australian Stock exchange. In 2021 the returns of these stocks wer

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Consider the resource and mining stocks listed on the Australian
Stock exchange. In 2021 the returns of these stocks were normally
distributed with a mean return of
3.9​% and a standard deviation of 10​%.
a. For a single stock chosen randomly from
that​ population, the probability that it would have a
percentage return less than 0 ​(that is, a​ loss) is: enter
your response here
​(Give your answer as a decimal rounded to four
decimal​ places, not as a​ percentage).
b. For a single stock chosen randomly from
that​ population, the probability that it would have a
percentage return between −8 and −18
​(Give your answer as a decimal rounded to four
decimal​ places, not as a​ percentage).
c. For a single stock chosen randomly from
that​ population, the probability that it would have a
percentage return greater than −6​is:
​(Give your answer as a decimal rounded to four
decimal​ places, not as a​ percentage).