2. (a) For a coin to leave with a charge of +2.0*10- C, how many electrons would be removed? (b) What is the corresponding fraction of electron this coin has? (Assume that the coin has a mass of 4.11 g and made up of pure copper). 3. Calculate the magnitude of the force between a point charge +2.60 x 10-7 C is 9.0 cm far from a second point charge of -2.0 x 10-7 C. 4. Identify the force between a - 2.0 C charge and +3.0 C charge that are 80 cm away from each other. 5. An electric field E = 5000 N/C passing through a flat square area A = 2 mz are distributed uniformly. Solve for the electric flux