i need to solve this hwrk but i wasmt in class. i need step by step on how to solve

Open-Response Homework 1: Qualitative Electrostatics, Coulomb Force Problem 1 The figure to the right depicts four possible situations involving five point charges, with values as indicated. The value of the charge in the middle is not given, but you should assume it is the same in all four cases. The distance between adjacent charges is (1) also the same in all cases. (a) For which arrangement is the net electrostatic force on the central charge greatest? Why? (2) -p (b)For which arrangement is the net electrostatic force on the central charge smallest? Why? (3) (c)Of the two arrangements left, which one has the strongest force? Why? (4) -e +e Problem 2 A charge of q1 = 4.0/C is at the origin and a charge 92 = 2.0/C is at a = -10m along the r-axis. What is the magnitude and direction of the force on a charge, go - 2.0/C, atx = 0m, y = 1m, due to q1 and 92? Problem 3 Imagine that you have a solid sphere made of some dielectric material, with a radius of 15cm, which may carry some charge on its surface (part (a)), or in its interior (part (b)) (a) If the sphere has a uniform surface charge density of o - -0.5/C/m, what is its total charge? (b) If instead it has a uniform volume charge density of p = 250nC/m', what is its total charge? Problem 4 Two uncharged conducting spheres supported by insulated stands are placed in contact. A positively charged rod is brought close to one of the spheres on the side opposite from the other sphere. (a)Describe the induced charges on the spheres, and sketch the charge distributions on them. (b) The two spheres are moved far away from each other and then the charged rod is removed. Sketch the charge distributions on the spheres. (c)Describe what would have happened if the charged rod had been moved away before the spheres were separated