2) a) A circular wire with a radius of 4m given in the figure has a charge density of pl = + 2nC /. Calculate the Electrical area formed 4m above 4- the center. b) Consider a long wire which has a +2nC/m of line charge density. If the measured charge is zero at point(1, 1/2, 5), find the generated electrical potential at an arbitrary (p, p, z) point. c) In the free space the voltage field is given as; V = V. Find the total energy stored in a cube by, 1