Determine whether -1 is an upper bound, lower bound, or neither of the polynomial function f(x) = 3x²  - 2x + 1.

Determine whether -3 is an upper bound, lower bound, or neither of the polynomial function f(x) = 2x³- 4x²  - x + 5.

Determine whether -2 is an upper bound, lower bound, or neither of the polynomial function f(x) = x³  -   4x²  + x - 11.

Determine whether 4 is an upper bound, lower bound, or neither of the polynomial function f(x) = 3x²  + x + 2.

Determine whether 5 is an upper bound, lower bound, or neither of the polynomial function f(x) = -12x²  - x - 3.

Determine whether -1 is an upper bound, lower bound, or neither of the polynomial function f(x) = 16x³   - 4x + 3.

Determine whether -3 is an upper bound, lower bound, or neither of the polynomial function f(x) = 3x⁴  - 2x³ + x - 1.

Determine whether -5 is an upper bound, lower bound, or neither of the polynomial function f(x) = -x³  - x - 1.

Determine whether -2 is an upper bound, lower bound, or neither of the polynomial function f(x) = 4x²  - x + 13.

Determine whether -1 is an upper bound, lower bound, or neither of the polynomial function f(x) = - x⁴ - 2x³ +  x²  - 2x + 1.