You decide that you want to make sure your estimate from part a is correct. You go out and gather 10 simple random samples of 25 people in your school and calculate the proportion of students within each sample whose Amazon packages arrive within two business days of ordering.The proportion of customers that receive their packages within two days of ordering are given below.0.70, 0.75, 0.6, 0.95, 0.90, 0.73, 0.87, 0.86, 0.92, 0.97a. Explain why all of the sample proportions are not the same.b. Find the average of all 10 proportions above.