Fitness Fanatics is a regional chain of health clubs that evaluates its club managers based on return on investment (ROI). The company's Springfield Club reported the following results for the past year: Required: The following questions are to be considered independently: 1. Compute the Springfield club's return on investment (ROI). 2. Assume the club manager can increase sales by $70,000 and net operating income by $18,200. Further assume this is possible without any increase in average operating assets. What would be the club's return on investment (ROI)? 3. Assume the club manager can reduce expenses by $14,000 without any change in sales or average operating assets. What would be the club's return on investment (ROI)? 4. Assume the club manager can reduce average operating assets by $70,000 without any change in sales or net operating income. What would be the club's return on investment (ROI)