Two parallel plates $($separated by $2\mathrm{.}0cm)$ are attached to a battery so that an electric field is created between them is $E=550\frac{N}{C}.$

a$)$ What is the magnitude of the electric field at $1\mathrm{.}0cm$ from each plate $($directly between$)?$

b$)$ An object with $q=-4\mathrm{.}0C$ and $m=3\mathrm{.}0g$ is placed in between the plates.

i$)$ What is the electric force on the object $($magnitude & direction$)?$

ii$)$ What is the gravitational force on the object $($magnitude& direction$)?$

iii$)$ What is the acceleration of the object $($magnitude & direction$)?$