Roberto's Steakhouse tracks customer complaints every day and then follows up with their customers to resolve problems. For the past $60$ days, they received a total of $13$ complaints from unhappy customers.

Using the given information, calculate $.$ Do not round intermediate calculations. Round your answer to three decimal places.

complaints per day

Using the given information, calculate the $3-$sigma control limits$.$ Do not round intermediate calculations. Round your answers to three decimal places. If your answer is zero, enter $"0".$

LCLc:

UCLc: