Assume you have the following information for the global market for agricultural commodity X. For each scenario, use demand and supply analysis to provide a likely explanation for the change in market equilibrium. The prices are per bushel and the quantities are millions of bushels.

Scenario	August 2018	August 2019
a.	p∗ = $142 Q∗ = 315	p∗ = $180 Q∗ = 315
b.	p∗ = $142 Q∗ = 315	p∗ = $128 Q∗ = 360
c.	p∗ = $142 Q∗ = 315	p∗ = $135 Q∗ = 275
d.	p∗ = $142 Q∗ = 315	p∗ = $142 Q∗ = 400