y=f(x) Transforms to |y|=|f(x)|

Q. Which of the following will have their graph plotted in first and second quadrant only?

1. $y=f\left(\right(x\left|\right)$
2. $\left(y\right|=f\left(\right(x\left|\right)$
3. $\left(y\right|=f\left(x\right)$
4. $y=\left(f\left(x\right)\right|$