Use the Empirical Rule to answer each question.

During 1 week an overnight delivery company found that the weights of its parcels were normally distributed, with a mean of 16 ounces and a standard deviation of 4 ounces.
(a) What percent of the parcels weighed between 8 ounces and 20 ounces? (Round your answer to one decimal place.)

(b) What percent of the parcels weighed more than 28 ounces? (Round your answer to two decimal places.)