Both supply and demand increase. Demand increases. Both supply and demand decrease. Demand decreases. Supply increases and demand decreases. Supply increases. Supply decreases and demand increases.
a. 1, 5, 2, 6, 3, 7, 4
b. 5, 1, 6, 2, 7, 3, 4
c. 5, 1, 6, 2, 7, 4, 3
d. 1, 5, 2, 6, 7, 3, 4