HELP PLEASE
Find the outlier of the set of data: 20, 23, 19, 25, 4, 18, 26

Can someone show me the steps to solve the problem?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?