Find one instance of each of the following using a nonsubscrip- tion site on the Web or an online library at your school. In an e-mail to your profes- sor, give a full citation for the document and describe how you found it.

a. Letter Ruling.

b. Action on Decision.

c. IRS Notice.

f. Code Section. g. Tax Regulation. h. Tax treaty. i. Tax Court Summary Opinion.

d. Revenue Ruling.

e. Revenue Procedure. j. Tax Court Regular decision.