Use the table to answer each question. Note: Round z-scores to the nearest hundredth and then find the required A values using the table.

Question

The weights of all the boxes of corn flakes filled by a machine are normally distributed, with a mean weight of 13.0 ounces and a standard deviation of 0.4 ounce. What percent of the boxes will have the following weights? (Round your answers to one decimal place.)
(a) weigh less than 12.5 ounces
%

(b) weigh between 12 ounces and 14 ounces