1. In a sphere with radius a, whose center is the origin of the (O, x, y, z) axis, r=(x^2+y^2+z^2)^1/2 There are loads with a volumetric density of p-e^(-r)+4r-1 a) Calculate the total load inside the sphere. b) Considering space as empty, the loads in question are inside and outside the sphere. Determine the electrostatic fields created in the regions by using the Gauss equation.