Which of the following is not a way bloodborne pathogens can be transmitted?

According to the passage weisers mother could be blamed for

Ten students compared the amount (in dollars) they spent on books each week. the box plot shows the results. the median amout they spent each week is . the difference of the first and third quartiles of the data set is?

What is the meaning of the prefix un-? a. over b. above c. under d. not