What amount of the Social Security benefits must George and Wanda include in their gross income under the following independent situations? Note: Do not round intermediate calculations. Round your final answers to the nearest whole dollar amount. Leave no answer blank. Enter zero if applicable. Required: a. George and Wanda file married joint and receive $10,050 of dividend income from stocks owned by George. b. George and Wanda file married separate and receive $10,050 of dividend income from stocks owned by George. c. George and Wanda file married joint and receive $34,800 of dividend income from stocks owned by George. d. George and Wanda file married joint and receive $17,400 of dividend income from stocks owned by George.