Two point charges -4 uC and 5 putC are located at (2, - 1, 3) and (0, 4, -2), respectively. Find the potential at (1, 0, 1) assuming zero potential at infinity. Q1 = -4 uC, Q2 = 5 uC What's our reference point V(r) = + + Co Areor - ri 4Tear - 2 V(00) = 0 Co = 0P2- Two point charges Q1= 500 nC, Q2 =-750 nC are located at (1, 3, 6) and (-3, 3, 1). a. Find the potential Vkat point K(0, 4, -1). b. If point M is located at (2, 4, 1), find the potential difference between Vi and Vi