Please help me with the following questions. Thank you so much!

Problem 6 Point charges q1 = 50 p0 and q2 = 25 p0 are placed 1.0 m apart. 1.0 m a) What is the force on a third charge q3 = 20 yC placed midway between q1 and q2? b) Where must q3 be placed so that the net force on gig is zero? Be sure to speciy with respect to what your distance is being measured. For example, to the right of q1 or to the left of qz. Problem 7 The charges q1 = 0.2 p0 , q2 = 0.4 pC , and q3 = 0.1 pC are placed at the corners of the triangle shown below. What is the net force on charge m? The answer should be expressed using unit vectors in a standard xy coordinate system. Q1 3.0 m 5.0 m 4.0 m