$004,10\mathrm{.}0$ points

A $61$ kg boy and a $41$ kg girl use an elastic rope while engaged in a tug$-$of$-$war on a frictionless icy surface.

If the acceleration of the girl toward the boy is $2\mathrm{.}2\frac{m}{s^2},$ determine the magnitude of the acceleration of the boy toward the girl.

Answer in units of $\frac{m}{s^2}.$