9 Study the data below for Alyssa Stephen's Hot Dog Stall and answer the questions that follow. The price of each hot dog is $6. . The variable costs of each hot dog is $2. Her rent is $400 per week. Sales quantity = 280 hot dogs per week. a Suppose Alyssa Stephen's Hot Dog Stall raises its price to $7. Construct a fully labelled diagram to show the old and new break-even following the firm's decision to raise its price. b Assuming there is no change in the demand for hot dogs at Alyssa Stephen's Hot Dog Stall, calculate the new margin of safety.