A ) A 2-?C point charge is embedded in the center of a solidPyrex sphere of radius R = 15 cm.

(1) Calculate the electric field strength E just beneath thesurface of the sphere. (in N/C ) - Answer them in term of \"e\" like[ ex. : 1.43e+05? ]

(2) Assuming that there are no free charges, calculate thestrength of the electric field just outside the surface of thesphere. ( in N/C ) Answer them in term of \"e\" like [ ex. :1.43e+05? ]?

(3) What is the induced surface charge density ?ind on thesurface of the Pryex? (in C/m^2) Answer them in term of \"e\" like [ex. : 1.43e+05? ]?

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B) Trying with diffrent variables, a 1-?C point charge isembedded in the center of a solid Pyrex sphere of radius R = 12cm.

(1) Calculate the electric field strength E just beneath thesurface of the sphere.( in N/C )? Answer them in term of \"e\" like [ex. : 1.43e+05? ]?

(2) Assuming that there are no free charges, calculate thestrength of the electric field just outside the surface of thesphere.( in N/C )? Answer them in term of \"e\" like [ ex. :1.43e+05? ]?

(3) What is the induced surface charge density ?ind on thesurface of the Pryex?(in C/m^2) Answer them in term of \"e\" like [ex. : 1.43e+05? ]