Please answer this, show your solutions in paper.I will give you a very good feedback. Thank you!In paper please :(

5. A small charged pith ball is suspended 2 cm above a second charge pith ball resting on an insulated surface. If the charge of the lower ball is +20 state and it has a mass of 0.25 g, what charge must be on the upper ball to lift the lower ball? 6. A point charge Q1 is at x = 0 and Q2 is at x = d. What is the relation between these charges if the resultant electric field intensity is zero at the following points: (a) x = d/2, (b) x = 2d; and (c) x = -d/2