Tax accounting; the 2nd and 3rd ones are wrong, please help

Exercise 3-18 (Algorithmic) (LO. 2) Compute the 2020 standard deduction for the following taxpayers. If an amount is zero, enter "O". Click here to access the standard deduction table to use. a. $ Ellie is 15 and claimed as a dependent by her parents. She has $575 in dividends income and $3,600 in wages from a part-time job. 3,950 $ 26,600 x b. Ruby and Woody are married and file a joint tax return. Ruby is age 66, and Woody is 69. Their taxable retirement income is $13,340. C. $ 2,600 X Shonda is age 68 and single. She is claimed by her daughter as a dependent. Her earned income is $180, and her interest income is $335. d. Frazier, age 54, is married but is filing a separate return. His wife itemizes her deductions. $ 0