2. Two positive charges and two negative charges are positioned at corners of a regular hexagonof sides, as shown. +Q P (10 points) (a) Determine an expression for the voltage at the empty corner P. (10 points) (b) Determine an expression for the electric field at the empty corner P. (10 points) 3. Two protons are released from rest a distance ro the speed of one of them when they are r = 3.00 pm apart? = 1.00 pm apart. What is