Francesca wants to start exercising to burn at least 1200 extra calories per week but she does not have much spare time for exercise According to a website she can burn an average of 2 5 calories per minute walking 4 calories per minute cycling and 8 calories per minute swimming She would like her total time walking and cycling to be at least 3 times as long as she spends swimming She would also like to walk at least 30 minutes per week How much time should she spend on each activity not only to meet her goals but also to minimize her total exercise time per week What is her minimum exercise time per week Let y be the number of minutes per week spent walking y be the number of minutes per week spent cycling and y3 be the number of minutes per week spent swimming What is the objective function that must be minimized 3 She should walk for Type an integer or a decimal W minutes per week She should cycle for Type an integer or a decimal She should swim for minutes per week minutes per week