Solve the given parts of following question:
Question: Two point charges Q1 = +4.90 nC and Q2 = 2.70 nC are separated by 25.0 cm.
Part A: What is the electric potential at a point midway between the charges?
________________ V
Part B: What is the potential energy of the pair of charges?
________________J
Please, try to give explanation for above question. Thanks.