I need help with this assignment if someone could help me figure this out, please!

NAME "Be sure to determine if SIGMA is known or unknown. Use the z-values and t-values from the charts in the modules. [Do not use your calculator for the values.) 1A. A random sample of the birth weights of 205 babies born to mothers who did NOT use cocaine during pregnancy has a mean of 7.22 lbs. and a standard deviation of 1.73 lbs. Use your calculator to construct a 95% confidence interval estimate of the mean birth weight for all babies of mother who did NOT use cocaine during pregnancy. 1A. 13. If the weights of babies born to mother who used cocaine during pregnancy was found to be 6.32 lbs.