A region in space containing cargo which is distributed sphericallyso that the s

Question

A region in space containing cargo which is distributed sphericallyso that the stocking load is given by the equotations:

= a for r<=R/2
= 2a(1-r/R) for R/2<=r<=R
=0 for r>=R

The total charge Q is 3*10^-17 C, the radius R of the overalldistribution is 2*10^-14 m and a is a constant which has dimensionsof C / m^3. Determine the constant a as
function of Q and R and the numerical value.
function of Q and R and the numerical value. b) Using the
Gauss's law find an expression for the measure of the electricfield as a function of distance r
from the center of distribution. Do this separately for each of thethree areas.
Make sure that your results agree with the borders of the areas.What fraction of
total load is contained within the region r<R/2?

please help me i spent 3 hours but cant find the desired solution

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