Let ๐ be the set of all complex numbers z satisfying $$|z^{2} + z + 1| = 1$$. Then which of the following statements is/are TRUE?
$$\left|z + \frac{1}{2}\right| \leq \frac{1}{2}$$ for all $$z \epsilon S$$
$$\left|z\right| \leq 2$$ for all $$z \epsilon S$$
$$\left|z + \frac{1}{2}\right| \geq \frac{1}{2}$$ for all $$z \epsilon S$$
The set S has exactly four elements
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