1) For each of the following businesses decide what single measure best reflects the overall level of activity in the business and give examples of costs that are fixed and variable with respect to small changes in the measure of activity you have chosen. (a) Retail store that sells music CDs (b) Dental clinic (c) Fast food restaurant (d) Car repair shop 2) Which of the above businesses seems to have the highest ratio of variable to fixed costs? The lowest? Which of the businesses' profits would be most sensitive to changes in demands for its services? The least sensitive? Why