The horizontal surface on which the objects slide is frictionless. If $F=6\mathrm{.}0N$ and $M=1\mathrm{.}0kg,$ what is the magnitude of the force exerted on the large block by the small block?

a$.7\mathrm{.}7$ N

b$.9\mathrm{.}8$ N

c$.9\mathrm{.}1$ N

d$.8\mathrm{.}4$ N

e$.6\mathrm{.}5$ N