More help Pls (am also giving away points).

Which system of linear inequalities is represented by the graph?

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.

Line wx is parallel to line yz. if m