Please solve these question in details and fully explanation. Because it is the prepare for lab, so in case for those data you needed, please just assume it as x, y, z and explain step by step, formula, etc. for me to do it. Thank you so much in advance.

Superposition of electric forces in one dimension. 1. The figure shows 4 configurations of three charges in one dimension . For each configuration , draw the force's acting on the middle charge then use a different colour to draw the netforce on the middle charge . Note : the relative magnitude must be correct L. A charge q, = + 2.Onc is located at the origin, and a second charge q, = + 4.On is located at position asd a ) At what position a will a q = -Inc charge experience zero net force 6) In past a, you should have found two mathematical solutions . Using a sketch, explain how you know which one is the physical solution ( You may use the applet " mixed charges" to study the two situations. () what physical situation does the other mathematical solution correspond to