A factory manager collected data on the number of equipment

A factory manager collected data on the number of equipment breakdowns per day. From those data, she derived the probability distribution shown in the following table, where W denotes the number of breakdowns on a given day.,a. Determine ?W and ?W.,b. On average, how many breakdowns occur per day?,c. About how many breakdowns are expected during a 1-year period, assuming 250 work days per year?