45-year-old Ramneek does not have time to work out every day. He wants to exercise 150 minutes a week. He figures that he plans his meeting times for work for the week, so he will apply this same procedure to his fitness schedule. He calculates that if he works out 5 days a week for 20 minutes each day, he will reach his goal. What feedback can his trainer give to him to help him better perform his calculations? How many minutes should Ramneek work out each day?