The total change in the price of a certain brand of cereal from 2008 to 2012 was - $0.20. Complete the table to show possible price changes in 2010 and 2012.

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?