Please help me answer this data management question. Please use readable handwriting.

The chart below shows the waiting times for customers while having their winter tires installed on their cars. Calculate the mean and the standard deviation. SHOW ALL YOUR WORK LIKE WE DID IN CLASS. Waiting times Frequency (min) l\\'-l .b _ _ _ - N ***Make sure to show all of your work. ***Make sure to state what your mean is. ***Round to 2 decimal places in your calculations and in your final