Use the Graph to Answer the Following Questions About CDs

Use the graph to answer the following questions about CDs.
a. What is the equilibrium price of CDs before trade?
b. What is the equilibrium quantity of CDs before trade?
c. What is the price of CDs after trade is allowed?
d. What is the quantity of CDs exported after trade is allowed?
e. What is the amount of consumer surplus before trade?
f. What is the amount of consumer surplus after trade?
g. What is the amount of producer surplus before trade?
h. What is the amount of producer surplus after trade?
i. What is the amount of total surplus before trade?
j. What is the amount of total surplus after trade?
k. What is the change in total surplus because of trade?