What’s the balance please help

Ihonestly have no clue if it's each or none.

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.

5. (03.02)if g(x) = x2 + 3, find g(4). (2 points)1619811