An infinitely long solid cylinder radius R1 lies with it's central cylindrical axis lying along the x axis. it is made of a non-conducting material. It has a volume charge density that varies with readius as follows... p(r)=A.r (C/m^3) where A is a constant. Consider a cylindrical Gaussian surface of length L, radius r, concentric with the x axis. 1) Derive a formula for the amount of charge enclosed by this Gaussian surface for r is greater than or equal to R1, and for r is less than or equal to R1 2) Use gauss's Law to find an expression for the electric field as a function of r in these two regions 3) graph the magnitude of the electric filed for these two regions. i would appreciate any help with this question because it is really stumping me.....Thanks!