Please answer this question.

A researcher focusing on birth weights of babies found that the mean birth weight is 3373 grams (7 pounds, 7 ounces) with a standard deviation of 582 grams Complete parts (a) through (c) below. D a. Identify the population and variable. Choose the correct population below. 0 A. The number of babies born the year the research was performed 0 B. The group of researchers 0 C. The group of all of the babies whose recorded weights were examined 0 D. The group of all babies ever born Choose the correct variable below. 0 A. The number 01 babies that were born 0 B. The accuracy of the measurements of baby birth weights 0 C. The weights of the babies at birth 0 D. The number of births per capita b. For samples of size 125r nd the mean 1!; and standard deviation 0'; of all possible sample mean weights. pi 2 (Type an integer or a decimal. Do not round.) 6)} : (Round to two decimal places as needed.) c. Repeat part (b) for samples of size 250. pi : (Type an integer or a decimal. Do not round.) 6)} = (Round to two decimal places as needed.)