This question refers to the "Customer Satisfaction" case. Download the "Complaints" file from the link provided, which shows the customer complaint history for $10$ months, including the number of orders, number of complaints, and the cost of complaints. It also has a break$-$out of these complaints by cause $($Note: assume one complaint per order$).$ Your team is chartered to reduce the cost of complaints. Which attribute control chart would be appropriate for monitoring complains as a percentage of total orders?