Hi need help for this probability questions: Suppose that Carl sells an average of 50 burgers daily and the standard deviation of daily burger sales is 4. Each burger sells for $4 and the cost price of each burger is $0.40. Any unsold burger is discarded at the end of the day. Assuming that daily demand is normally distributed, please recommend the number of burgers that Carl should prepare each day.

Thanks for help. Will definitely give thumbs up for the answers.