Solve it with only the necessary steps(without long explaining )

Q2. A male worker consumes food containing a total of 3500 calories ( 3500kcal) each day. He is 60 years old and weighs 200 lb. He sleeps 8hr each night, and his average energy expenditure rate while sleeping is assumed to be his basal metabolic rate. When he is not working or sleeping, his energy expenditure rate averages 1.7kcal/min (no correction for weight). What must be his average energy expenditure rate (kcal/min) for the 8hr he works, if it is perfectly balanced with his food calorie intake? His digestive metabolism is assumed to be 10% of the total of his basal and activity metabolic rates over 24hr