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The function $x(t)$ is shown in the figure. Even and odd parts of a unit-step function $u(t)$ are respectively,

1. $\frac{1}{2}, \frac{1}{2} x(t)$
2. $-\frac{1}{2}, \frac{1}{2} x(t)$
3. $\frac{1}{2},-\frac{1}{2} x(t)$
4. $-\frac{1}{2},-\frac{1}{2} x(t)$