و آر ایل:https://media.cheggcdn.com/media/159/1594b35b-f122-4101-99c8-4646bb55a65c/php14EGNi
و آر ایل:https://www.chegg.com/homework-help/questions-and-answers/demand-walnut-fudge-ice-cream-sweet-cream-dairy-approximated-normal-distribution-mean-16-g-q61724172
