Which of the following is a TRUE statement about federal tax law? 1 Primary authorities of federal tax law come from the three branches of government. II Your tax textbook is primary authority of federal tax law. III Secondary authorities of tax law help a tax practitioner locate primary authorities. IV Treasury regulations are a secondary authority of federal tax law. a) Only I and II are TRUE. b) Only III and IV are TRUE. c) Only I and III are TRUE. d) Only II and IV are TRUE. e) I, II, and IV are TRUE. Question 5 (3 points) Saved Bill filed his 2021 individual income tax return on February 15, 2022. The due date to file his 2021 tax return was April 18,2022 . The statute of limitations for the IRS to issue an assessment on Bill's 2021 tax return ends on which of the following dates