Help with 1B and 2A and B please.

Question 1: Potential Energy (3) lb) An immovable charge (21 : +5.0pC is placed in fixed location. Another charge, 02 = +3.0,uC and mass m2 = 6.0;:9, is allowed to mom near the first charge. (a) Evaluate the potential energy of 02 when it is 4.0 cm from Q. (bl If Q2 starts from rest from a point 4.0 cm from 01, what will be its speed when it is 8.0 cm from QI? Assume there are no additional forces acting on this charge and 01 does not move. An immovable charge Q1 = 2.0#C is placed in fixed location at the origin on an (x, y) coordinate system. Another charge, 02 = +1.0,uC and mass m2 = 7.0ptg, is allowed to move near the first charge. (a) Evaluate the potential energy of 02 when it is at the location (3cm. 4cm). (b) If 02 starts from rest at the location (3cm, 4cm) what will be its coordinate location and speed when it is 2.0 cm from Q}? Assume there are no additional forces acting on this charge and 01 does not move. Question 2: Coulomb's Law {3) lb) Two charges are placed in an (x, y) coordinate system. The first charge is located at {1cm, Gem) and the second charge is placed at (0cm,1cm). Find the magnitude and direction of the net force on the first charge if both charges are orI = qz = +0.8 C. Three charges are placed in an (x, y) coordinate system. The first charge is located at (2cm, 2cm) the second charge is at (2cm, 2ch and the third charge is located at (0cm, 26711). Find the magnitude and direction of the net force on the first charge if all charges are ql : q2 = Q3 : +1.2 C