I need help solving this homework question. Thank you

1. Summary Statistics (a) Obtain Et zi for the following cases: (1) z; = 1 and n = 6. (2) zi = i and n = 6. (3) zi = 212 and n =6. (4) zi = 1/i and n = 6. (b) Compute from first principles (i.e. using the formula and a calculator) the mean, standard deviation, coefficient of variation, symmetry statistic and kurtosis statistic for the sample 7, 2, 0, 3. Show all calculations. (c) IQ scores have a mean of 100, standard deviation of 14 and are approximately normally distributed. What range of IQ scores do you expect 95% of the population lie in