Can someone please help, ty!!

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Pls brainliest will be awarded if answer is correct

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.