A solid metal sphere with radius $0\mathrm{.}25$ m carries a total charge of $0\mathrm{.}12$ nC$.$

a$)$ Use Gauss$$s Law to find the Electric field at a point $0\mathrm{.}30$ m from the center of the sphere.

b$)$ Use Gauss$$s Law to find the Electric field at a point $0\mathrm{.}20$ m from the center of the sphere.