The weight of topsoil sold in a week is normally distributed with a mean of 1200 tons and a standard deviation of 24 tons.

(a) What percentage of weeks will sales exceed 1236 tons? (Round your answer to two decimal places.)
%

(b) What percentage of weeks will sales be less than 1176 tons? (Round your answer to two decimal places.)
%

(c) What percentage of weeks will sales be between 1188 and 1212 tons? (Round your answer to two decimal places.)