Why is it wrong? I need a step by step answer please i have no clue what to do

10 points? me . its important ‼️‼️

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.

Find measure angle 1 and measure angle 3 in the kite the diagram is not drawn on the scale