8. Three students at the same school hear about the success of cookie delivery businesses on college campuses. Each student decides to open a local service. The individual supply schedules are shown below.

Quantity supplied Delivery charge Esra Remzi Camilo

$1 2 3 6

$2 4 6 7

$3 6 9 8

$4 8 12 9

$5 10 15 10

$6 12 18 11

a. Draw the individual supply curves.

b. Sum the individual supply schedules to compute the short-run industry supply schedule.

c. Draw the industry supply curve.