XYZ Corporation has a December 31 year-end.

a. When is XYZ Corporations tax return due?

b. When does XYZ Corporation need to make its estimated tax payments?

c. Assuming that XYZ Corporation owes $5,000 on the original tax return due date and it files for an extension and is granted an automatic extension to file tax returns, what is the extended tax return date and when should taxes be paid?