New World Theater tracks customer satisfaction in their cinema. In a recent survey, they asked for feedback from the customers where each customer had the opportunity to mention one thing they were displeased with. The outcome was that 797 customers answered the question with the following result: cramped seats (76); poor sound (21); bad selection in the candy shop (29); limited view to the stage (45); insufficient reclining capacity of seats (48); temperature too high (32), other (63); none (483).

a) What percentage of respondents did not have any complaints?

b) Make a Pareto chart summarizing the responses.

c) If you were the owner of the theater, which two or three issues would you first deal with?

d) Which other tool would you, as the theater owner, use to better understand the quality issues?