Help! I am completing a truth table for the following combination logic diagram and I was wondering what the black dots on the diagram mean? PLEASE let me know what they do and if they do anything to the numbers

Be sure to answer all parts. synthesize the following compound from benzene. a. b. c. d. e. f. reaction [1] conditions: a b c d e f reaction [1] product: draw structure reaction [2] conditions: a b c d e f reaction [2] product: draw structure reaction [3] conditions: a b c d e f reaction [3] product: