Apositive charge distribution exists within a nonconducting spherical region of radius a. the volume charge density ρ is not uniform but varies with the distance r from the center of the spherical charge distribution, according to the relationship ρ=βr for 0< =0< =a, where β is a positive constant, and ρ=0, and r> a. a. show that the total charge q in the spherical region of radius a is βπa^4b. in terms of β,r, a and fundamential constants, determine the magnitude of the electric field at a point a from distance r from the center of the spherical charge distribution for each of the following cases. i. r> aii. r=aiii 0