Order, in increasing magnitude of the forces, the following interactions:

$1)$ gravitational force between two nanoparticles

$2)$ electrostatic force between two electrons

$3)$ optical force from a $1$mW laser on a sub$-$micron nanoparticle

$1,2,3$

$3,1,2$

$3,2,1$

$1,3,2$