Please show how you got the answer for each question

1. A particle with a charge of +8 uC is placed 6 cm away from a second particle with a charge of -7 JC. Calculate the electrostatic force exerted on the second particle by the first particle. Show formulas and calculations. 2. Three particles with charges q1 = +3Q, q2 = -6Q, and q3 = -3Q are situated around the origin, with locations q1 at (1,1), q2 at (-1,1), and q3 at (-1,-1). What is the value of the net electric field, E located at the origin