You and your classmate were discussing some recent observations on your college campus. Using the concepts of elasticity, how would you explain each of these situations:

i. Textbook prices at the campus bookstore are 20% to 30%

more expensive than online retailers.

ii. You notice that at the restaurant where you wait tables, the bar gives away free salty snacks like popcorn and peanuts.

iii. The athletics department charges lower prices for football tickets to students than those to the general public.

iv. Parking prices increased 25% for the school year and you still have difficulty finding an open spot.