A uniform steel girder, $XY$, has a total length of $8.4$ metres. The girder is balanced horizontally on a hydraulic jack positioned at its midpoint, $M$. A welding unit with a mass of $75kg$ is positioned on the girder at a distance of $2.8$ metres to the left of $M$. A portable generator with a mass of $120kg$ is placed at a distance $y$ metres to the right of $M$ such that the system remains in static equilibrium.

Find $y$.

Select your answer from the following choices:

$1.50m$

$1.75m$

$2.10m$

$4.48m$