Find integers that are upper and lower bounds for the real zeros of the polynomial (P(x) = x⁴ - 2x³ + x² - 9x + 2.

a) Lower bound: -3, Upper bound: 3
b) Lower bound: -2, Upper bound: 2
c) Lower bound: -4, Upper bound: 4
d) Lower bound: -1, Upper bound: 1