Compute all parts of given question:
Question: Two identical point charge having charge of -2.5 x 10-6 C are 25 cm apart.
Part I: Calculate the magnitude of Coulomb force on one of the charge?
Part II: What is the total Coulomb force if the pair?
Part III: What is the electrostatic potential at a point that is 10cm from one charge and 15 cm firm the other?
Please show all work and steps to find the magnitude of Coulomb force on one of the charge.