Tammy (unmarried, age 56) claims her elderly mother (age 74) as a dependent. Tammy's mother does not live with her, but Tammy pays for almost all of her mother's household costs. If the mother has $3,000 of taxable interest income and good eyesight, the mother's 2020 standard deduction is: 1) $1,600. 2) $2,700 . 3) $6,400. @4) $7,950. 5) $1,100