Assume the following: (1) three people go to a restaurant, (2) each person orders a soda for $2 and the group of three orders a large pizza to share for a price of $12, and (3) a fourth person joins the group and orders one soda and is invited to share in eating the pizza. Which of the following statements is false? (You may select more than one answer.)

a. The cost of the fourth person’s soda will be $2.

b. The total cost of the four sodas consumed by the group is $8.

c. When the fourth person joined the group the total cost of the large pizza increased to $16.

d. When the fourth person joined the group the average “pizza cost” per person dropped to $3.