Section 1.1, Problems 8 b), c), 9, 15, 28, 30, 39.
Use truth-tables to prove one of the distributive laws.
Section 1.2, Problems 8, 11, 16 b), c), e), g), 23, 40.
Change the statement-forms in 8) and 9) into logical equivalents
without conditional and biconditional arrows.
Section 1.3, Problems 10, 11, 12 b), 41.