2. (12 points) A thin rod, placed along x-axis, has a charge Q=+20.00 nC (Q = +20.00 nC) uniformly distributed over its length L = 12.00 cm 4.00 cm 12.0 cm. a = 4.00 cm and b = 8.00 cm. 8.00 cm a) What is the linear charge density of the rod? b) Find the x component of the electric field at point P. P c) Find the y component of the electric field at point P. d) Find the magnitude and direction of the total electric field at P