c. (20 pts) We say that class xprecedes class yif all students who took y, also took xat an earlier semester with a passing grade (passing grade is 2). Find the id, name of all pairs of classes xand ywhere xprecedes y.

Sports and entertainment class, your goal is to increase attendance and make a profit for a game by getting your team on a winning track with total salaries less than $3,000,000

3pointsyou've found an image you want to insert into your slide presentation. youwant to make the image look more gray so that it looks like an older imagewhat would you need to adjust? 0.00o a. sizeo b. hueo c. contrasto d. tones

How does a vaccine prevent sickness and individual?