The Canada Mortgage and Housing Corporation lists average monthly apartment rents for many cities in Canada. According to its report, the average cost of renting a two-bedroom apartment in Halifax is $833. Suppose that the standard deviation of the cost of renting a two-bedroom apartment in Halifax is $84 and that two bedroom apartment rents in Halifax are normally distributed. If a Halifax two-bedroom apartment is randomly selected, what is the probability that the price is:
a. $900 or more?
b. Between $800 and $1,000?
c. Between $725 and $825?
d. Less than $600?