What would be the mean of the number of customers who buy specialty clothes for their pet each day?

What would be the mean of the number of customers who buy specialty clothesfor their pet each day?A) 9B) 11C) 14D) 16(For questions 18 and 19): It is generally believed that electrical problems affect about14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new carson the lot.18) What is the standard deviation for the sample proportion?A) 0.011