Silas develops this algorithm to compute the calories burned for an activity for a given number of minutes and body weight: If the activity is running, compute caloriesPerMin by dividing weight by 10.5 If the activity is walking, compute caloriesPerMin by dividing weight by 15.5 Compute numCalories by multiplying caloriesPerMin by numMinutes He implements the algorithm in an app, and users soon ask for the ability to compute the total calories for multiple sessions of walking or running. What structure must be added to the original algorithm so that it can compute the total across multiple sessions